Oscillo

scope

Digital Storage Oscilloscope

Operation Manual

@ ez Digital Co.,Ltd.

05- 30200/400/600

•

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Digital Storage OscilloscopeOperation Manual

DECLARATION OF CONFORMITYaccording to ISO/lEe Guide 22 and EN 45014

Manufacturer 's Name:

Manufacturer's A ddress:

Declares that the product :

Product Name :

Model Numbers:

Date :

E Z Digit a l Co.. Ltd.

222-28. Nae -dong, Ojeong -gu.Bucheon -s i, Gy ecnggi-doR.O.K , 421 -16 0

OSC ILLOSCO PE

05 -3 0200, 05 -30400, 05-30600 ,

Aug. 18. 1995.

Conforms to the following product specifications :Certified by TUV Rhein lan d

Safety:

EMC :

Supp lementary In formation :

EN 61010- 1: 1993(l EC 1010- 1 : 1990+ A1:1992, modified )

EN 50081- 1: 1992EN 50082- 1: 1992

The product herewith complies with t he req uirement s of t he Low VoltageDirective 73/23/EEC and the EMC Direct ive 89/336/EEC .

Bucheon, Gyeonggi

Location

.C. )' . /LU'J?

Chea l Young KimQuality Assurance Manager

Safety Summary

Safety Precautions

Please take a moment to review these safety precautions. They are

provided for your protection and to prevent damage to the oscilloscope.

This safety information applies to all operator and service personnel.

Caution and warning sta tements.

CAUTION Is used to indicate correct operating or maintenance

procedures in order to prevent damage to or destruction

of the equ ipment or other property.

WARNING Calls attention to a potential danger that reqwres correct

procedures or practices in order to prevent personal injury.

Symbols

Cautionj refer to accompanying documents ) and Warning,

Protective ground(eart h) symbol.

Introduction

T hank you for purchasing a EZ product. Electronic mea surin g inst ruments produ ced

by EZ Digita l are high technology products made und er strict qu ality control.

We guarantee their exceptional precision and utmost reliability. For proper use of

the produ ct plea se read thi s user manual carefully.

~ EZ Digital CO. .Lt d,

Note

I. T o fully maintain the precision and reliability of the product use it within the range

of standa rd setting (temperature W'C - 35·C . hu midity 45% -85%) .

2. After turning on-power. please allow a pre-heating period of as long as some 15 minutes

before use.

:J. This equip ment should be used with a triple line power cord for sa fety.

4. For quality imp rovement the exterior design an d specifications of the product can be

changed without prior noti ce.

5. If you have fur ther questions concerning usc. please contact the EZ Digital service

center or sales outle t.

Warranty

Warranty service covers a period of one year from the date of originalpurchase.

In case of technical failu re within a year , repair service will beprov ided by our service center or sales outlet free of cha rge.

We charge customers for repa irs a fter the one-year warranty period hasbeen expired. Provided that against any failure resulted from the user'snegligence, na tural di saster or accident, we cha rge you for repairsregardless of the warran ty period.

Fo r more professio nal repair service, be sure to co ntac t our service

center or sales outlet.

- CO NTENTS -

l. Descrip tio ns of the prod uc t

\-1. Introduction

1-2. Specifications

1-3. Points to bc chec ked prior to usc

1-4. Accessories

2. Operating instructi ons

2-1. Function of eac h block

2-1-1. Displ ay and power blocks

2-1-2. Vertical amplifier block

2-1-3. Sweep and trigger blocks

2-1-4. Read out

2-1-5. Storage block

2-1-6. Miscellan eou s featu re

2-2. Basic func tions and measurement

2-2-1. Con nec tion of measuri ng signals

2-2-2. Adj ustment during initial operation

2-2-3. Data display

( I) Real time mode dis play

(2) Storage mode displ ay

2-2-4. Real time mode meas urement

(() Single -trace measu rement

(2) Dual-trace measurement

(3) T rigger selectio n

II

I I

13

17

18

14

2 1

21

····· 21

23

······ 26

27

28

29

24

30

33

33

35

38

38

.~ <)

-I I

(4) Addition and differe nce measurement

( 5) X-Y measurement ··

(6) Delayed-time axis opera tion

2-2-5. Digital storage mode function

( I) Normal storage mode ( MODE) ·

(2) Equivalent sampling mode

(3) Roll mode

(4) Single mode

(5) Hold mode

(6) Save mode

(7) Save memory display ( RECALL)

(8) X-Y plot ou tput

(9) Horizontal magni fication di splay

( 10) Int erpolation

( I I ) ALT MAG .( 12 ) GO -NOGO ·( 13) Menu mode( 14) X - Y measurement

2-3. Measurement applications .

2-3-1. Ampl itude measuremen ts

2-3-2. Ti me interval measurements

2-3-3. Frequency meas urements .

2-3-4. Ph ase di fference measurements

2-3-5. Rise time measurement

44

45

46

49

49

49

51

52

53

53

53

54

54

57

58595965

66

66

70

72

73

77

3. X-Y digital ou tput

3-1. Application X-Y plott er

3-2. Plotter specification

3·3. Connection

3-4. Setting

3-5. Operation

3-6. RS-232C interface

3-7. Major troub le,

4. Serial co m m unication us ing RS-232C

4-1. Introduction

4-2. Specification

4-3. Connector pin arrangement and signal description

4-4. Connection

4-5. Operation and command

4-6. Transmission/reception data format

4-7. Separating character

4-8. Abnormal operation handling

RO

80

80

R5

85

. ··· · 90

90

90

91

..···· 9 \

91

....... . 91

93

94

96

102

102

4-9. RS-232C interface cable connection and instrument opera tion .... 102

4-10. Generation of data transmi ssion/re ception program

4-11. Key cau se of abnormal data transmission/reception

4-12. Program examples

\0 2

.... ···10:1

\0:1

5. User mainten ance guide J J I

5-1. Cleaning J II

5-2. Calibration J I I

6 . OS-3IXX)DSRS diugrum-, J 12

6-1. External views J 12

6-2. Block d iagram II .'

1. Description of product

1-J. Introduction

This product OS-3000DSRS is the 2 channel digital storage oscillosco pewhich is equipped with ND converter.It combines the benefits of digital scope to measure, store, interpret and

communica te the rapid trace, with the benefits of ana log scope to measurethe wide band width, 2 time axis generato r, delay sweep and separated TVtrigger signa l.It reduces the measurement error, and' uses 6% squared type CRT withinternal flourescent scale which enables to take the photograph ofobserved waveform.

(l) High speed optical frequency band widthND converter installed on each channel samples the input signal atthe ma x. rate of 20MHz samples/sec. Any signal with perfectrcpcatedness can be stored. (Max. 20-60 MHz)This product ca n be used as an ordinary real time oscilloscope withfrequency range between 20 and 60MHz .

(2) Large storage capacityEach channel has 2kW memory . Since it can indicate the waveformcomposed of IkW data, it measures any rapid ly changing transitiontrace with high accuracy .

(3 ) Waveform saveIt has 1kW memory to save two waveforms stored in each cha nne l.

(4) Multi-Fu nctionIt has a variety of following functions to interpret a wide ran ge ofsigna ls :- Roll mode function to measure low signal.- Average function to elimina te noise from the signal and to measure

the pure signal.

II

(5) OutputIt uses bot h RS-232C in terface func tion to input/output the digitaldata to th e perso na l com puter, and RS-232C to conduc t screen hardcop ythro ugh digital plotter. It also interprets and reco rds the storeddata.

(6) CRT an d cursor reado utIt can pro mptly perform the operation and measurement using both th eCRT readout func tion to display the set info rmation of panel and thecursor readout function to display the voltage difference (8 V) . timedifference (8 T) and frequency difference (l /8 T) between twocursors.

12

1-2. Specifica tions

Spec. Model OS-J0201l OS-J0400 OS-JOWO

-CRT1. Configuration and 6-inch rectangular screen wi th internal graticulc ; Sx 10 DiV

useful screen (1div= [em ), marking for measurement of rise time.2mmsubdivisions along the central axis.

2. Accelerating +1.9kV approx. + 11.5kV approx.potential (ref. cathode) (ref. cathode)

J. Phosphor PJI (standard)

4. Focussing possibletwith autofocus correction circuit)

5. Trace rotation provided

6. Scale illumination variable7. Intensity control provided

- Z-Axis input(Intensity Modulation)

I. Input signal Positive going signal decreases intensity. (+5Vp-p or more signalcases noticeable modulation at normal intensity senings.)

2. Band-width DC-2MHz (-3dB) DC-3.5MHz (-3dB)

3. Coupling DC4. Input impedance 2a-3Ok-ohms5. Maximum input voltage 30Y (DC+peak AC)

*Vertical DeflectionI. Band-width (-3dB) DCto20MHz normal DCto 40MHz normal DCto60MHznormal

DC coupled DCto 7MHz magnified DCto 7MHz magnified DCto IOMHz magnifiedAC coupled 10Hzto20MHz normal 10Hz to40MHz normal 10Hz 1060MHznormal

10Hz 10 7MHz magnified 10Hz to 7MHz magnified 10Hz 10 IOMHzmagnified2. Modes CHI. CH2.ADD. DUAL CHI.CH2,ADD.DUAL

(CHOP;TImeJdiv switch - 0.25 to 5m<, (CHOP : Tune/div switchALT;TimcJdiv switch 2ms 10 O.211s 0.25to 5ms

ALT:TimcJdiv switch2msto O. II'S

3. Deflection Factor SmY/div to SV/div in 10 calibrated steps of a 1-2-5 sequence.Continuously variable between steps at least I : 2.5xS MAG; ImVldiv to IVidiv in IO calibrated steps.

4. Accuracy normal ; + 3%. magnified; + 5%

5. Input impedance approx. IM-<>hm in parallel with 2SpF+ 3pF

6. Maximum input voltage Direct ; 3OOV(DC+peak AC), (with probe; refer to probe specification)

7. Input coupling AC-DC.GND8. Rise time 17.5nsorless 8.8ns or less 5.8ns or less

(sOns or less;x5) (sOns or less;,5 ) (35ns or less;x5)

9. CHI out approx. 20mY/div into 50 ohms ; DC to IOMHz (-3dB)

10. Polarity inversion CH2 only11. Signal delay none delay cable supplied

13

.- OS -.'020D OS -.'060DSpec. --------______ Model OS-.'O·jOD

*Horizontal DeflectionI. Display modes A, A int, B. B TRIGD. X-V2. Time base A O.2i 'shJiv 10 O.2sid iv in 19 calibrated steps, 1-2-5 sc- 0. 1P~/div 10 O.2s-'uiv in 20

qucncc. uncalibrutcd continuous control bcrwccn calibra ted steps 1-2-5 sc-steps at least 1 : 2.5 quence uncalibrated con-

tinuous control betweensteps at least 1 : 2.5

Hold-off time variable with the holdolT control

3. Time base B Ool/ Js/div to O.2/ls.div in 7 calibrated steps. 1-2-5 se- 0.1 }Js.'div to IOIJsh.liv in 7qucnec. calibrated stcps t-z-S sc-

quence

Delayed sweep I div or less to 10 div or more

Delay time jitter better than I : 2(xx}()

4. Sweep magnification IOtimes (maxi mum sweep r..Llc;20n\-idiv)lOtirncstrnacimurn sweepINOle;50ns/div, lOns/div of A TI~lE BASE

are uncalibrutcd. rate ; IOns/div

5. Accuracy + 3%. (ot 10 50t ). additional error for magnifier + 2%

*Trigger SystemI. Modes AlITO. NORM. lV-V. lV-H

2. Source CHI, CHl, LINE. EXT3. Coupling AC

4. Slope + or

5. Sensitivity and 2OHz·1MHz lMHz·1OMHz 2OHz·1MHz 2MHz-40MHz 2OHz·1MHz lMllz.ffiMlizFrequency !NT U.Sdiv l.Sdiv INT O.5div 1.5div INT Il.Sdiv l.SdivAlITO. NORM EXT O.2Vo-o O.8Vo-o EXT O.2Vo-o O.8Vo-o EXT O.2Vo-o O.8Vo-olV-V. lV-H at least I div or l.OVp-p Composite Sync.

6. External triag" fMo hm in pararall with approx. 30pFInput Impe anceMax. input voltage 250V(LlC+pcak AC)

*X·y Operation(same as CHI except for the following)l. X·'3XisDeflection factor: same as that of CHIAccuracy; ± 5%Frequency response ; DC to 500kllZ(-3dll l

~ . Y axis same as CH2.~ . X·Y phu-,e dittcrcuc...· 3" or less (at DC to 50kHz)

*Readout FunctionI. Cursor readout Voltage reference ~V; ~-REF

function Time reference ~T ; ~·REF

Frequency reference II ~V; ~-REF

2. Panel setting Vertical axis (CHI. CH2)VfDlV. UNCAL. MAG (convened value)displays Horizontal axis : SfDlV. UNCAL. MAG (convened value)

3. Effective cursor Vertical : withinf 3 divrange from center Horizontal : with in f 4 divgraticule

4. Resolution 1(25 div

1-1

Spec. Model ()S - Jll~O() OS ·.'O·IO» (lS- 'ON) )

• Digital sto rage function 1()l)l)Wtlnh /CHI. Display memory

I00:IWortJ... elf »: 22. Sav'c memory3. Acquisit ion memory Sus/div - 20sld iv : 2000word , ICIi ! Susl div -20sl di v : 2000 wordsi CH

0.2usldiv - 2sl div : IOOOword s/ CIi o .lu, l d iv-2usl div : IOOOword siCH-

4. Vert ical resolut ion 2 ~ poi nL t1 i\

5. Horizontal resol ution lOOPoint/div

6. Maximum sapmling rate 20 Msl s

7. Digital Band Width S M lIl (4 samplesl Cycle )single shot event 20 M II , 4OM I17 6OMII,."': I'll..'II\ v \,.'\ cru 7M Hz at Y axi s xS 7MJlz 31 Y ax is x5 7MHz at Y axis xS

MAG MAG MAG

8. Data acqu isit ion · NO RM mode : storage the da ta each time triggermethod · A VG mode : averaging from 4 to 256 times

· ROL L mode : da ta is continuously stored on the CRT· 1I0LD mode : data is he ld for 'he NO RM. AVG . RO LL· S INGLE mode: wa veform is held after stored

9 . Display Funct ion · SMOOTIi : the storage waveform is displayed by dot s or smooth· Il'oTERPO LAn ON : the sto rage waveform is di sp layed by dot .

linear of sine interpolation· ALI MAG : Si multa neo usly dis playi ng the original waveform and its

ma gnified waveform· GO· NOGO : judgement and co mparing of acquisition signal

10. Data save Up to IwO stora~ data can be saved.Sa ved data can reca lled to tnc display whenever reau ired .

I I. Pre -trigger Var iable (0 .04 div step)

12. Plotter plo tter output of the CRT d~layed inform ation to an IJP ·GLplotter via the RS· 232C inte ace .

1,'\ " I l .L1 .1outpu tRS·232C

14. Magnified displa y x \0 by Tirn e/ div switch or MAG switch

15. X-Y operation Sig le trace X-Y X ax is - C H 1 ·X ax is - SAY axis - CH 2 Y axis - S8

Dual trace X-Y X axis - C H IY axi s - CH 2

Sensitivity X axis : C II I ImV -S V/ div ± S%Y ax is : CH 2 ImV-S V/ d iv ± S%

Ph ase erro r 3" or less from DC -SO Kllz

16. Swee p time O.2IJs.'div- 20s div 0_11'- dl\ -20" di_repetitive signaLO.2Ils/di",'-2/Js/div repetitive signal:O.1jJs Ji \ - 2ps div,roll mode:O.5j'S,,'di\"-20s.'d i\ roll mooe:O.5j'S.'d i\" - 20s.'divALT:O.5 1 1~d iv- 20s div AI.T O.I,><;Idiv"().5msldivCIIOP: Imsldi_- 20, 'd iv CHOP:O. Ims'div-20s!div

17. Readout function ( Panel se u ing displd:)V/ div. uncal . MA .Si div, uncal. MAG _X-Y. Tri~ger point, no. of averaging. roll mode. smoolhing.interpola tion method .save memory informat ion .trobe seni ng

( ursor reado ut)Voltage difference 6 V : o -RefT ime diffe rence ,0, T : t::.-RefFrequency II t::.I : 6 -RefPretn gger 'm.G : 6

I:;

Sf'L". - \luJd ()S· .lO~()1> OS -.10.1(1) OS ·.1( 01)1)

* Calibrator'(probe ~ IJj ) approx. l U I, fn.."Juclli.) ', 05\' (.t]% ) ' q U. IH.' \ \ ;j\ I..'

Juty ral l\l 50%

* Power SupplyF , ,

I . Voltage range voltage range .. '1

I()()( 40 -I IOV)'AC"2A F2A

120( IOK- I32V)/AC220( 198 . 242 V)/AC

IA F IA2.1(~207 · 250 V)iAC

2. Frequency 50 I 1'011,

3. Power consumption appro, . 70 W. upprov . 711\ \ ..ppm\ . 70W .

* Phys icalCharacteristics

I. Weight approx. 8kJe approx.8kJ;:: "Pp'O\. Ski:

2. D imension 320 m W) X 140 m (10 X 430 m (LJ

*Environm entalCharacteristics

I . Temperarure range + 1Ot: to + 3st: (+ 5O'F to +9S'F)for rated operation

2. ~t a:< . ambientoperating temperature at: to + 4Ot: (+3tF to + 104'F)

3. Ma:<. storagetcmerurure - 2Ot to + 70t: (-4'F to + ISS'F)

4. Humidity mnge forrated operation 45" to + 85" R11

5. Max. ambientoperating humidity 35" to + 85% RH

• Safety Er\61010- 1 overvoltage CAT IT. degree of poilulion 2.Approval :TOVI

, B tC lnterferdnce :EN50081-1Susceptab,hty :EN50082- 1. IEC80 1-2, 3. 4

c Cautiono .Sourccs like small hand -held radio tran sceivers, fixed station radio and televisiontransmitters . vehicle radio tran smitters anJ cellular phones generate electromagnetic radiationthat may induce voltages in the leads of a lest probe In such ca ses the accu racy of theoscilloscope canno t be guaranteed due to physical reaso ns.

16

1-3. Points to be checked prior to use

Comply with the following procedures for safety and to prevent damage tothe product prior to operating this product.

1-3-1. Line voltage selection

Before use, check the voltage.

This instrument must be operated with the correct line voltage selectorswitch setting to prevent damage in reference to table I-I.To change the line voltage selection :1. Decide the voltage range and fuse in reference to table I- I.2. Make sure the instrument is disconnected from the power source.3. Pull out the Line Voltage Selector switch on the rear panel. Select

the arrow mark position of the switch from Table I-I. Slide thearrow mark to the desired position and plug it in.

<Caution> : Th is product has the ground chassis (3 wire power cord isused ) . Check whether any other equipment connecting withth is product requires the transforme r before use. If so, donot connect the DC/AC or the hot chassis equipment if notransformer is available.Do not directly con nect it to the AC power nor to thecircuit directly connected to the AC power.Otherwise serious person al injury or damage to this productfor a long time without trouble .

Table 1-1. Line voltage select ion and fuse ratings

Line voltage Arrow mark positionFuse Ratings(250V)

ULl98G IECI27

90 - II OVAC 1002A F2A

108 - 132VAC 120

198 - 242 VAC 220IA FIA

207 - 250 VAC 230

17

I copyl EA2 EAI EA

1-3-2. Install ation and han dling precautions

Wh en placin g the OS-3()()()DSRS in service at your workplace, obs erve thefollowing precautions for best instrument performan ce and longestservice life.

1. Avoid placi ng this instrument in an extremely hot or cold place.Specifica lly, don 't leave thi s in strument in a close car, exposed tosunlight in midsummer, or next to a space heater.

2, Do not use this instrument immediately after bringing it in from thecold. Allow time for it to warm to room temperature, Simila rly,don't move it from a warm place to a very cold place, ascondensation might impair its operation,

3. Do not expose the instrument to wet or dusty environments.4. Do not place liquid-filled containers on top of this instrument.

A spill could seriously damage the instrument.5. Do not use this instrumen t where it is subject to severe vibration,

or strong wind.6. Do not place heavy objects on the case, nor block the ventilation

holes.7. Do not use this oscilloscope in strong magnetic fields, such as near

moto rs.8. Do not insert wires, tools, etc. through the ventilation holes.9. Do not leave a hot soldering iron near the instrument.

10. Do not place thi s osci lloscope upside dow down on the ground,otherwise damage to the knobs may result.

11. Do not use this instrument upright while BNC cables are attached tothe rear-panel connectors, This will damage the cable.

12. Do no t apply voltages in excess of the maximum ratings to the inputconnectors or probes. (Refer to 1-2 specification)

13. Thi s oscilloscope is 10 use UL listed double insulated probes on ly,

-4. Accessories

The below listed accesso ries are contained in the package of thi sinstrument.( I) Op erating manual(2) AC power code(3) Probc(OPTION)(4) Fuse

18

2. Operating Instructions

(A) FRONT PANEL ITEMS

35 20 33

WAItN'N(;........." ....... "'­._"' .."'..- ....C......ToO/<........__..,-...-s ' .... . ..........,.""" ...._ ~ ......"...

4 '''' __.' ''

,

,. '"

7 8

(B) REAR PANEL ITEMS

Fig. 2-1 . 05-3020D front/rear views

19

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I "'"1' I .''''- ~ :,:0: '.- -,~:; .. .. '',,);,',.,.?~ c=j'1Ii

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.... , _. . . " _ ., JT . ~ - .. "

Iq ..._- , " ~ ~ "' -

, :: eMf!'!)'! W5iC)~ ~~ ~! 'S>

l~~r-C::I . • == L:..I L..J L.J ~ ~'- <" _

I 0 -· -' °' = ...•. - _ .. .~ ."-........c:::J 4 • DO ~OCJCJ

J0 ~-~ - -~'~, , . . ' ,

9. ©~: :O~ O §g o ::OU©~.. .(I) -t:~ ~~ ~

~......~&I --- -- I CH1 (rJ 0 .:::,

, ,

I , II " .. .. ... ,~

.... I '· ~ ~'- _ . n._A'::'"A:I -, .. @&,," :,\ <6:. 0 @i~ o;o¥iB . , . - "' J'-._- ' . .. ... ......._- - ... -

0' ~~~ ~4:C) --= · . == ClCJc:::l=_ ..."'00 D O' 0 0 0 0--= · .- , 1/" !! II ,

C) ~-~ -_.~, . . ' ,

©~ :'0 :' c ~ CD .'0 . ©~9- - ) I •

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(I) & ~ ~-c: il:h. ~"",,~~,c - - - -- I ;~ ".) CHI:Z: CH2 1!lIS~ ~ ",:,-,

-, , lA -_ i .. 'h U ' ,

/ .... ,~~ ~ .-._. .... _-I

..~«(j1Q ©~' ®§~I . .: , ; .J : ' ", ','

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,, - - , , -oJ . , ..~ ~,!IZ;.? ~,t..

0 --= == c.J CJ CJ CJ...... -. 0 =_ aoro __

--= · . == CJ CJ CJ caI , i ll", 41

I I~ ~-~ -_.~~~, . I @5l" ©~ ::0, :. © CD .' () . 8:-

9. - ' '--, ' - .... "/

, - , ..~......~~I! (I) ''''.~ ~...... ~I -._-..- -- I - - ~I ( H l l[ ( Hl lt ~ 10:.

05-300005R5 Front Views

20

05·30200

05·30400

05·30600

Thi s sec tion describes the measurement proced ures and methods utilizing a

variety of basi c informa tions and functions needed for operating this

instrument.

2-1. Function of each block

The numbers shown in the following descrip tions represent each terminal

indicated on Fig. 2-1.

2-1-1. Display and power blocks

[ I ] POWER SWITCH[ 3] INTENSITY

[ 4] FOCUS

[ 5] TRACE ROTATION

[ 6 ] SCALE ILLUM

[ 7 ] VOLTAGE SELECTOR

[ 8 ] POWER CONNECTOR

2-1-2. Vertica l amplifier block

Push in to tum instrument power on and off.Adju st the bri ghtness of CRT. Clockwiserotation increases brightness.Adjust sweep lines for obtaini ng the highest

definition.Adjust sweep line s for obtaining the high est

definition.It adju sts the brightness of scale. and usefulwhen observation is made in a dark place orwhen taking the ph otograph of screen.Selection is permissible to make the voltagesuitable for operating power.Co nnection and removal of the AC power cord is

easy when using.

[ 9] CHI. X IN CONNECTOR: Connects input signal to CH1 verticalamplifier or becomes a X-axis signal during

X-Y opera tion.

<CAUTION> To avoid damage to the oscilloscope. do not apply more than 250VrDC+PeakAC) between "CH I" terminal and ground.

[10] CH2. Y IN CONNECTOR : Connects input signal to CH2 verticalamplifier or becomes a Y-axis signal duringX-Y operation .

<CAUTION> To avoid damage to the oscillosco pe. do not apply more than 250V(DC+PeakAC) between "cnz" terminal and ground.

[ 1l][12] AC-DC.GND To be used when selecting the meth od ofcoupling input signal to vertical amplifier.

21

AC

GND

DC

[ 13][ 14J VOLTS/DIY

[ 15J[ 16J VARIABLE

[ 17J[ 18J POSITION

PULL CH2. lNV[18J

[19J V MODE SWITCH

CHi

CH2

Ca pacitor between inp ut connector and verticalamplifier interrup ts an y DC compo nent of thesignal.

Co nnects inp ut connector of vertical amplifierto the ground , thu s establishin g GND as a

reference point.

By making direct connec tion between in putconnector and vertical amplifier, input signalis directly connected to vertical ampli fier.

As bei ng the attenuator by each step selectin gvertical deflection sensitivity, measurementof waveform is practicable regardless ofsignal magnitude and those shall be used byhaving them placed at the appropriate position

so as to make waveform mea surement easy .As being the minute adjustor being used when

having vertical deflection sensitivity

continuously va ried , if they are fully rotated

counterclockwise the attenuation ratio becom esless than 1/2.5 of indicated value. When youpull out the knob, vert ical axis sens itivity

becomes x5 times.

At time time. the maximum sensitivity becomesImV.

Being used for moving verti cal axis waveform.Clockwise rotation moves wavefo rm up and

counterclockwise rotation moves it down .

Wh en pulled ' out, the signal applied to CH2appea rs inverted.

Bein g used for selec ting the displ ay mode ofvertical axis.

Displays only the signal input to CH I on theCRT.Displ ays only the signa l inp ut to CH2 on theCRT.

DUAL Two signa ls thai a rc input to CH I and CH2

a ppear on the CRT simulta neously.CHOP : TIME/ DI Y 0.2s-Sms

ALT : TIME/DIY 2ms-0.21'i (. OS-3060 lJ : 0 .1 us )

ADD Displays the algebraic sum of CH I and CH2signals.

[ 20J CHI OlIT CONNECTOR Provides freq uency counter or other deviceswith a part of signals that arc input 10 CH I

by having them amplified.

2-1-3. Sweeps and trigger blocks

B

x-y

AlNT

[2 lJ HORIZONTAL DISPlAYA

To select the sweep mode.A pushbutton sweeps the CRT at the main (A)

tirnebase rate when pressed .A !NT pushbutton sweeps the CRT at the main

(A) tirncbase rate when pressed, and the B

tirnebase intensifies a section of thetracets) . (In case of OS -30600. pres> A and Bsimuhanously),

The sector whose brightness is modulated is

disp layed on the screen in a magnified form.

BTRIG'D the delay sweep is triggered by the

first trigger pulse.pu shbutton pro vides X-V operation. (only

OS-306(0 ).

( • A sweep appears in STORAGE mode.)• In OS-3000 DSRS. the horizontal display is as follows

( Fig. 2-2 and 2-3) .

HORIZ OISP• B

CJ CJA INT B '1'RIC"o

c:J CJ

HORIZ OI<PfA " '1

CJ 0x- Y B 'PtIG'D

CJ CJ

Fig. 2-2. 05-30200 , 3040D Fig. 2-3. 05-30600

[ 22J A TIME/DlV To select eithe r the calib rated sweep rate ofthe main (A) timebase, and X-V operation

( )S - J() ~()J ) . OS -30.fOD ) for dcluycd-vwccp operation .

[23J B TIMElDlV To select the calibra ted sweep ra te of thecalibrated ( B) timebase.

[ 24J DELAY TIME POSmON To dete rm ine the exact sta rting point withinthe A timebas e delay ran ge at wh ich the Btimebase will begin sweeping.

[ 25J A VARIABLE Being used for hav ing A sweep time variedcontinuou sly from the calibrated position.

PULL XIO MAG : When you make the part to be magnified alignwith the central scale of the vertical axis by

adjusting the position of the horizontal axisand when you pull the X10 MAG switch, thewaveform, the left and the right of which aremagnified centering around the middle,appears. At this time, sweep time becomes1/10 of the indicated value of TIME/ON.

[ 26J HORIZONTAL POSm ON: Being used for adjusting horizontal positionand being used independently of the timemeasurement of waveforms.Clockwise rotation of the knob moves it to theright and counterclockwise rotation moves itto the left.

[ 27J TRIGGER MODEAurO

NORM

TV-V

TV-H

[28J TRIGGER SOURCE

CHI

CH2

LINE

EXT

Selects the sweep triggering mode .Th e sweep occurs au tomatically.

When there is a triggering signal, the sweeptriggered normally is obtained and thewaveform stops.

Where there is no signal and the trigger IS

not made, the sweep still occursautomatically. This position is convenient ingeneral use.Triggered sweep can be obtained, but whenthere is no triggering signal and triggeringis not made, then the sweep does not occur,then the sweep does not occur. This mode iseffective when the effective triggering isdesired to be done in a low frequency (approx.25Hz or less) .Being used for measuring a composite videosignal in a frame unitThis one is used for meas uring a compositevedeo signal in a scanning line unit.This can select the convenient portion of thetrigger source .It can select the CH I as the trigger sourcewhen there is a signal on CH l.

This can select the CH2 as the trigger sourcewhen there is a signal on CH2.This one is used for observing a signal whichis triggered on the frequency of AC power. It

can also stable observe components derivedfrom the power in which a measuring signal IS

contained.External signal becomes the sourc e oftriggering signals. And this one is used whenmaking a triggering regardless of the size ofsignals of vertical axis.

25

[ 29J HOLD OFF

[ 30J TRIG LEVEL

TRIGGER SLOPE

[31J EXT TRIG IN

This one makes complicated signa l triggerredcerta inly by cha nging the HOLD OFF time of the

main sweep. It is also effective in triggeringsuch complicated signals as high freque ncysignal, irregula r signa l or digita l signa l,

etc. by extending sweeping time.Adj ust it slowly for the stab ilizedtriggering. It is normally used after having

it fully rotated counterclockwise.T his one selects a starting point of

triggering signa l.When the knob is rotated clockwise, thetrigger point moves toward the + ( pos itive)maximum value and when rotating itcounterclockwise, it moves toward - ( negative)

maximum value.Being used for selecting trigger slope of the

initial sweep. When the switch is pressed,this switch selects positive / +) slope and whenpulled. the switch indicates negative (-)

slope.Being used for connecting external trigger

signals to trigger circuits.

<CAUTION> To avoid damage to the oscilloscope , do not apply more than 250V(DC+PeakAC) between "EXT Trig In" terminal and ground.

2-1-4. [3 2J READOUT

READOUT/CURSOR

Fig . 2-4. Readout/Cursor

Gi) SELECT : This switch selects cursor to change among 6,

REF, TRACKING ( "', REF) cursors.

Th e selected cursor is displayed on the top(or left side). ( 6 , \7)

26

® s», toT, l/toT

C9 ON/OFF

2-1-5. [ 34] STORAGE

: This switch switches among '" Y, '" T, 1/'" Tmodes.

: Pressing {;:, Y and SELECT toggles the readoutfunc tion ON or OFF.

: Moves the selected cursor upward , downward,right or left.

STORAGE ~ODE

SlORAG£ YENU HotD SA't£

Cl Cl Cl CJS1NCt£ SElECT PLOT RECAll

Cl Cl Cl Cl

Fig. 2 ·5 . Front panel storage mod e switch

is> STORAGE SWITCH

CD MENU SWITCH

: When LED goes out, it performs the normalrealtime oscilloscope function. All theswitches do not operate. Pressing this switchonce lights up LED , en ters into storage mode ,and all the switches operate. Pressing thisswitch once more in storage mode enters intoREAL TIME mode. In storage mode, LED blinksasynchrono usly along with sampling.

: Press this switch to change average,interpolation, prob e state, roll and smoothi ngON/OFF. Whenever pressing this switch, themode is changed, and the currently selectedmode is displ ayed on the top right of CRT.Eac h set mode is ch an ged by pressing SELECTswitch unde r MEN U switch.

27

Gil HOLD SWITCH

® SAVE SWITCH

CD SINGLE SWITCH

CD SELECT SWITCH

® PLOT SWITCH

CD RECALL SWITCH

2-1-6. Miscellaneous

: Pressin g thi s switch stops sampling, and thewaveform displayed on the screen stops and LEDlights ON. Pressin g thi s switch againreleases HOLD state, and sampling begins.

: This switch stores the display waveform in the

storage memory. Th e disp lay waveform isstored by this switch in H OLD state.In no n-HOLD mode, only the switch state ischa ntged .

: Thi s switch measures the cha nge in theinstantaneo us (intermi uent) waveform.

: This switch cha nges the MENU switch settingmode.

: Thi s switch outputs the display waveform onthe X-Y plotter. Pressing switch transmittsda ta and lights up LED . This switch operatesonly in the HOLD sta te (HOLD LED lights up) .

: Thi s switch is used to display the storedwaveform on CRT again . Pressing this switchlights up the LED. Wh en LED goes out afterpressing th is switch continuously it relea ses.

[33] DIP SWITCH and RS-232C CONNECTORDIP SWITCH Sets the PLOT or communication mode at the

time of plotter outp ut or at the communicationwith computer,

RS·131C CONNECTOR Co nnects RS-232C cabl e ( Fig. 3-2 and 4-2) atthe time of plott er output or at thecommunication with co mputer.

[35] EXT BLANKING INPlIT CONNECTOR : For applying signa l to intensity

modulation of the CRT. Tra ce brightness isreduced with a positive signal, and increased

with a negative signal,

[ 36J CAL TERMINAL

[ 37] GROUND CONNECTOR

2-2. Basic measurements

O utp uts the squa re wave (O.5V, IkHz) to

ca libra te the probe and vertica l amplifier.

Provides an a ttac hme nt point for a separate

ground lead .

2-2-1. Co nnec tio n of mea suring signals

There are th ree different meth ods for observing signals by means of theosc illosco pe as foll ows :

I. Meth od using lead wire

2. Method using coaxial cable

3. Method using probe for oscilloscope

I. Method using lead wire

This method is the simple one bu t it can only be used in the even t

that the signal level you intend to measure is either a high level

signal or a low impedance circui t (such as TTL circuit). At thistime, groun d wires shall be connected between the grounding term inal

of oscillos cope and the gro undi ng surface of objects to be me asure d.

However, in case that th e wire picks up h um and noise because the

wire is not shielded, the measurement may ofte n be difficult whe n

mea suring low level signals. As it is hard to have the wire

co nnec ted to the connector of oscilloscope, using a binding adapterfor BNC is desirable.

2. Method using coaxial ca ble

This method is the most prevailing one which is widely used when an

output connector is attached to the me asureing object As the

shie ld coating of coaxial cable prevents hum and noise, accurate

measureme nt ca n be performed.

Since the coa xial cable are usually fitted with BNC connectors on

each end and there are many vari eties of types by their purposes, it

j ust wou ld be advis able to usc a suitable one as needed. When

measuring high frequency signa ls, a terminator having an impedance

of the sa me val ue as the im ped ance of me asuring signal sources shall

be used, and the coaxial ca bles sho uld also be matched with the

term inato r in terms of impedance. Even when using a long ca ble,

should you use th e subject meth od, an acc ura te measurement co uld be

performed without affecting measurement signa ls.

29

3. Method using prob e for oscillosco peUsing a probe is most preferable to any other alternatives whenperforming the measurement onto circuits. The probes arc availablewith IX (direct connection) position and lOX (atten uation) position.As thc input signal att enuates by 1/10 with the input impedance ofoscillosco pe with probe increased at lOX position, measurement unit(VOLT/ OIV) must be multiplied by ten ( 10). (e.g. it becomes 50mV X

10 = 0.05V in 50mV/OIV) . As the probe of oscilloscope also usesshielded wires, it can prevent hum and noise. When you intend toperform the measurement by using the coaxial cable, you shouldexactly know the source impedance, the highest frequency involve d,and the capacitance of the cable, etc,If an y of these factors are unknown, use a 10 X probe.

2-2-2. Adj ustment during initial operation

measurem ent

OFF ( released)Fully counterclockwiseMidAC20mV

In the middle and pushed inFull y clockwise and pushed inCH I0.5111sFully clockwise and pushed in

MidAUTOCH IMidNORM ( max. CCW)

to the power connector [ 8J.2. Co nnec t the power cord

Co mp ly with the following procedure before conducting theI. Adj usting knob is as follows

POWER SWITCH [ iJINTEN CONTROL [3JFOCUS CONTROL [4JAC-GNO-OC SWITCH [ 11,12JVOLT/OIV SWITCH [ 13,14JVERTI CAL POSITIONCONTROL [ 17,18JVARIABL E CONTROL [ 15,16JV. MODE SWITCH [ 19JTIM E/OIV [22J

TIME VARIABLE (25)HORIZONTAL POSITION [26JTRIGG ER MODE [ 27JTRIGG ER SOURCE [28JTRIGGER LEVEL [30JHOLD OFF [29J

30

3. Pres s in the POWER switch [1 J. About 30 seconds later , rotate theINTEN [ 3] control clockwise until tbe trac e appears. And then,adjust brightness so as to make it suitable for observing.<Caution> A burn-resistant material is used in the CRT. However if

the CRT is left with an extremel y bright dot or trace fora very long time, the screen may be damaged. Th erefore,if a measurement requires high brightness, be certain toturn down the INTEN control immediately afterward. Also,

get in the habit of turning the brightness way down ifthe scope is left unattended for any period of time.

4. Adj ust the FOCUS control [ 4] to make it produce the finest anddistinctest definition.

5. Make sure tha t the traces align with horizonta l graticule lin es byturning the CH I vertical POSITION control [ 17J. Whe re the traces donot align with horizontal graticule lin es, then mak e them align with

each other by adj usting the TRACE ROTATION [SJ.6, Turn the HORIZONTAL POSITION control [26] to make it align with the

left-most graticule line .

7. Co nnect the PROB E to the CHI , X IN connector [9] to make it alignwith the left-most graticule line .

8. If the top and a certain portion of the square waves are tilted orpointed, adjust the control terminal of the PROBE by means of asmall screwdriver as shown on Fig. 2-b (b ).

3 1

CAPACITANCECORRECT IONTR,MM( R

HOOK COVl R

~GROUND CLIP

I .. ) PROBl

R( TRA(lABl (HOO k TIP

CQR;UC TlYC()'j P( NSAH O

illUNDER

COMP£HSATl D

(tllH H CTS Of PROO£ COM PENSATION

Fig. 2-6. Probe compensation

(jVl RCQMP( NSATfO

2-2-3. Dat a d isplay

(I) Real time mode display

Cursor measurement value

/Cursor -.

I I

[>- - - - - - - - - - .- - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - -

I I I I I I

CHI Scalefactor

ADD CH2 Scalefactor

A sweep, B sweepX-V Scale factor

CD CH I and CH2 scale factor display

1<-- V/DIV ---->1r ~1 - r OX- r->- r ~ -r0-r-m- r; -1L __ L __ L __ L __ L _ _ L __ L __J

PROBE displayPIOX lOX PROBEPIX IX PROBE

BLANK

>*

CALUNCALX5MAG

In ADD mode, • +' is displayed between scale factors of CHI andCH2.

33

.<t A sweep. B sweep factor display and X-V displa y

1< VIDIV >1

r - -r - -r - -r- -r - -1I > I 0. 1 5 m sl _ _ L __ l _ _ L __ L _ --.J

[BLANK Xl CAL

• XI0 MAG> : UNCAL

1)ln X-V ope ration mode, X-V mode isdisplayed. and TIME/DIY settingdata and B setting data disappear.

2) ln B sweep mode, B TIME isdisplayed and TIME/DIY selling data

disappear.

® Cursor measurement disp layT he meas ured value between cursors is displayed.

I<:- --- -- Measured valu e --->I-r --r- -1

I 0 V I_ L __ L_---1

It;. V : CH I, CH2, AD D, DUALo: T : Ti me differe nce

between two cursorsfor A TIME/DIY

1/ t;. T : Reciprocal of t;. T

t;.V : +. - , m v, V. div6.T: +, -. ps, ms, s, div

1/ t;. T : MHz, kH z, Hz, mHz, ?

•div" is displayed in the following

cases- The measurement value of the

channel selected by VERTICALMOD E switch is not in CAL mode.

- B sweep-X-Y mode- A sweep (UN CAL mode)-CHI and CH2 VOLTS/ DIY are samewith each other when the VERTICALMODE is ADD.

(2) Storage mode displa yLocation of data displ ay on CRT

Pre-trigger and cursor mea surement value

1>- - - - - - - - - - - - - - - - - - -

Cursor ::::

~Average. smoothing.

'--------1 interpolation and samplingmethod save switch, PROBE

I state

Save A -II------;:===+ ,-_~- Save B scale facto rscale facto r

ADD

CH I scale factor CH2scale factor

A scale andX-Y scale factor

NOTE Waveform or even previously stored waveform may bedisplayedwhile input signal is stored in storage mod e. While.waveform is stored, the instrument stores the settingcondition associated with sweep factor and waveform. Thesevalves are always displayed when waveform is displayed.

* CHI , CH2 and A sweep factorsWhen CH I and CH2 waveforms are displayed. the sweepfactor corresponding to waveform is displayed.

* Pre trigger and cursor measurementThe sweep waveform corresponding to the function selectedusing cursor selector switch and vertical mode switch isdisplayed.

* SAVE A and SAVE B sweep factorWh en the waveform is stored in the memory. V/ON andTIME/ O N is displ ayed. Wh en the stored waveform isdisplayed on the CRT by pressing RECALL switch, thissweep factor is displayed.

(1' C II I a nd C H::' ' '' CCp faC lor di spl ay

r - -r - -r - -r - -r - -r- -r- -1I Pl , OX . > I 1 I 0 lD V ;l __ l __ l __ l __ L _ _ l __ L _ _ J

Prob ePIOXPIX

displaylOX prob eIX probe

Blank

>*

CAL

UNCAL

X5 MAG

@ A and B sweep sweep factor display and X-V display

1<-- SIDIV ---->1r--- r - -r - -r - -r - -1

> . 0.• 5 ID ,SL _ _ l _ _ L __ L _ _ L _ -J

BLANK

*nJ

XI CAL (No hori zontal magnification )

No interpola tion :JSine wave interpolati on XIO MAGLinear interpola tion (Horizontal

magnification )

In X·Y ope ra tion. A sweep sweepfactor disappears and x ·y isdisplayed .

@ Pre trigger selling displayTrigger point of display waveform against the trigger point of

display waveform .

(Example

<D Refer to 2-2-5 for the display of average. smooth ing,interpolation, sampling method.

36

® Curso r measurement value displayThe measured valu e between cursors is dis played.

Measured value- - - - - >1

lJ. V I : Volt difference between lJ. V : -t- , - . mV, V, divtwo cursors for CHI and Dual a T : -l-, - , ns, !'S, rns, 5, divsweep waveform.

lJ. V2 : Volt difference betweentwo cursors for CH2sweep waveform ,

lJ. V : Voltdifference betweentwo cursors for ADDsweep waveform,

lJ.T : Time differencebetween two cursorsfor A sweep waveform

1/ lJ. T : Reciprocal of lJ.T

1/ lJ.T : MHz, kHz, ?, mHz, div

•div" is displayed in the followin gcase :

-The measurement value of thechannel selected by VERTICAL MODEswitch is not in CAL state.

-A sweep VAR mode is not in CALmode at the equivalent samplingmode.

-x-v mode

-In HOLD state, TIMEIDIV switchexceeds the measurement MAG range.

-The VOLTS/DIV of CHI an d em arenot same with each other whenvertical mode is ADD.

37

2-2-4. Real time mode mesurement

(I) Single-t race mea surementSingle-trace measurement is the most elementary function of thismeasuring ins trument.Use this mode when you intend to measure one single signal. Since

this instrument comprises two channels, just choose one of CH I andCH2. CH 1 has an OlITPlIT term inal [20], and it is desirable for youto use it when you intend to mea sure the frequency by mea ns of a

frequency counter.CH2, as the INVERT switch [ 18], is practica ble to have the polarity

of waveform inverted.

<D Set the switches as indicated below when you use the CH I. The

words in the bracket represent the setting wh en using CH2.POWER [ I] ON

AC-GND-DC [Il ], [12] ACVERTICAL AXIS POSrnON[ 17],[ 18J : Mid rotation and pushed inVAR IABLE [ IS], [ 16J Fully CW and pushed in

V MODE [ 19] CHI (c m)

HORlZ. DISPLAY [21J AA T IME VARIABLE[251 Fully CW and pushed

TRI GGER MODE [27J AUTOTRlG SOURCE [28] CHI (Cm)

TRlG LEVEL [30] Mid rotation

HOLD OFF [29J NORM (positioning it at

the end of CCW)

® Position the trace on the center of CRT by adjusting theVerti cal POSmON control.

@ Connect the signal by means of the 'IN connector [9J [IOJ and

tum the VOLT/DIY [ 13], [ 14] so as to make the signal fullyappear on the CRT.

(Caution) Do not apply a signal greater than 2S0V ( DC + peakAC ) .

<D Tum the TIME/DIY switch [22] so as to make the signal becomethe des ired cycle. For the general measurem ent display of 2 or

3 cycles is suitable but when measuring the closed upwavefo rms , displ ay of 50-100 cycles is proper. And adjust the

T Rl GGER LEVEL co ntrol [ 30] with having it rotated to make astable waveform appear.

38

® If the signa l to be measured does not trigger or themeasureme nt is diffic ult beca use of its weakness though theVOLT/D1V switch is positioned on SmV. pull the VARIABLE ( PULLXS MAG ) [ lSJ [ 16]. At thi s time. where the VOLT/ON switch isset to SmV, it becomes lmV/ON and the frequency wide bandwidth decreases to 7 MH z. However. the noise increases on thetrace .

® If the signal you wish to observe is a high frequency, thusresulting in too many cycles tho ugh the TIM E/D1V switch whichis set to the position of 0.2~s. pull the 'TIME VARIAB LEtermi nal ( PULL X10 MAG ) [ 2S]. Then the sweep speed increasesby ten [ IOJ times so that 0.2~s beco mes 20ns/div an d O.S~s

beco mes SOns/div.0.2 and O.S~s MAG arc the uncalibrated term inal and 1us orless is the calibrated terminal. (Wh en magnified by XIO inlu s/div, the value is ± 10% and when mag nified by XIO in lessthan I ps, the value is ± S%) .

(j) When measurin g DC or very low frequ ency. the AC couplingresul ts in the attenuation of signal or distortion so that usethe instrument after having the AC-OC.GNO switch [ 11], [ 12Jpositi oned to DC.Ca ution : Where the waveform of very low AC level is loaded on

the high DC voltage. it may not appear on DCposition.Th e NORM of TRIGG ER MODE switch [27J is the position

to bereswept. Wh en observing signal frequency below 2SHz, youca nalso perfo rm the measurement by adj usting the TRIGGERLEVEL[30]. .

(2) Dual-trace measu rementDual-trace measurement is the major function of this instrument,OS-3OOO0 . The measuring procedure is same as that of 2-2-4single-trace measurement abov e with the excepti on of the following :CD Set the V MODE switch [ 19J to dual.

Use ALT for rela tively high-frequency signals (TIME/O N switch:O.2rns or faster). and usc CHOP for rel at ivel y low- freq uencysignals (TIME/DIV switch : O.Srns or slower) .

39

@ If the two channels are of th e same freque ncy. you can exactly

initiate the triggering with TR IG G ER SOURC E switch [2s1

S,M"' '''IIH'1

. 1..... 1 \hI1..ISVt< ,., 1..1

( a) Co mpos itive video signa l

I:

,- '--

(b) TV-V coupling

I I 1

~ m~m.1III

l1T

II, I I

Ie

(c) TV-H coupling

1

r_~ r_TI !, I

r-I 1"- I\...,f-- M t '-,iI\I I.,'I

( d) SYNC polarity

Fig . 2-7. 'TV si nc s ignal separation

40

1Il"",1, \'( "'1.AlI T'r

~_u.;1CJ'o

(3) Trigger selection

Triggering is the mo st co mplica ted o peratio n to perform fo r the

osci lloscope becau se this instrument has man y requi rements that

have to be incid entall y applied. and it requ ires an exact

synch ronization as well.

CD Tri gger mod e selectionAut o trigger mode :Since the synchronized sweep alwa ys appears. even though there

exists no signal nor ha s the trigger adjusting been don eimproperly granting that there exists a signal. you havenothing to worry about that erro rs ca n possibly arise from the

NORM.However. where the signal frequency is less than 25Hz. the AUTO

cannot be used. At this time. the mea surement has to be done at

the NO RM position.NO RM trigger mode :CRT beam appears only when the signal is synchron ized. This

trigger MODE docs not cause the trace to appear in case thatthere is no signal, that the synchroniza tion adjusti ng has been

done improperly and that the ven ieal PO SITI ON has beenincorrectly adj usted or that the YOLT/DIY switch ha s been

improperly positioned.TV-V. TV-H trigger mode :

The cleanly synchronized waveform can be observed with

separating the waveform such as a co mposite video signa l( Fig. 2-7(a » into the horizontal and vert ical componen ts by

adding a TV sync separation circuit, For the synchronizationof vertical components of the TV signal ( Fig. 2-7(b » . set theTrigger MODE switch switch to TV-Y. For the synchronization ofhorizo nta l components of the TV signa l (Fig. 2-7(c». set the

Trigger MO DE switch to TV-H. When the TRIGGER has beenseparated ( Fig. 2-7(d». the TV sync pola rity sho uld benegative/ - ) .

41

@ Trigger poin t selectio nThe SLO PE switch determines wheth er the sweep shall start fromthe rise-starting poi nt or from the fall-starting point. (SeeFig. 2-8) .Depressed switch represents the rise-start ing point andreleased switch indicates the fallstarting point.

Q) Trigger level selectionThi s position represents the starting point of the signal whichis input with either CH I or CH2.Th e signal starting point varies as shown on Fig. 2-9 by

turning the TRIGGER LEVEL control [30] to the left and right.

42

-,

i

/ 1 Iuec ..\

II 1/ IISLoPE LI 1L....,j u

I ·I S I..1l1'... . ..1POSI Tt.( sco-r

I ) STAAN{ (,Al ' ';(

POSITt y{ Sl Ol'{( '~ ~,/ ~t(.A T'Y l

~ C~lI

(a) Sawtooth waveform

j - --

- -

" - r-«~[-"", I

~'- f-

I IS lAIlTtl'C;I'«(,AT I';{ Sl

1.I S "'A l t~ AT

POSlflY( Sl cP {

STA8l { Il'ISll'C> I ' ~Lt Pf..> POflT

~'~I " "'I ~;H J"".~

( b) Square waveform

Fig. 2- 8. Tr igger point select ion

"'"NO'::;:...0 --

llY1l Start Poi nt

Fig. 2-9 . Trigger level select ion

(..0 Additi on and difference measurementsThe measurement of the addition and di fference is it functionrepresenting one waveform by addin g two signals. Th e o peration ofthe add ition (AD D) repre sent s the algebraic sum of the C H I and CH2signals, and the opera tion of the difference represents thealgebraic difference between the CH I and C H2 signals.Measuring procedure of ADD of this instrument, OS · .1I1( ~ )I)SRS i-, asfollows :I. Set up per paragraph 2-2-4(2) dual-trace meas urement.2. Set both VOLTS/DIY switch [ 13J and [ 14J to the same pOS1l10n

and turn the VARIABLE controls [ 15J and [ 16J fully clockwiseuntil being click-stopped. Wh ere the amplitude difference ofthe two signals is cons iderably large, reduce both VOLTS/DIYswitches simultaneously as much as to make the am plitude of thelarger signal be within the screen displ ay.

3. Select the TRIGGER switch having the biggest signal.4. Set the V. MODE switch [ 19] to ADD posit ion)

Then, the algebra ic sum of the CH I and CH 2 signals appea rs as asignal wavefo rm. At th is time, since the posi tion cha nge ofVertical POSITION controls [17] and [18J varies the measurementvalues, operation sha ll be prohibited.( Note) If the two input signals have the same phase, the two

signals appear as the algebraic sum of the ind ividualtraces (e.g. 4.2 DIY + 1.2 DIY = 5.4 DIY) .Where the two input signals have 1800 counter-phase,the two signals appear as the difference (e.g. 4.2 DIY

1.2 DIY = 3.0 DIY) .

5. If the pop amplitude of the resultant trace is very smallsignal, perform the measurement after having a large markingmade on the screen display with adjusting both VOLTS/DIYswitches.

The re is another method measuring the algebraic sum of the twosignals of this instrumenL

That is the method performing the mea surement at the same time whenpulling the CH2 Vertical POSmON control [ 18] on which 'PULL

CH2 INY" is marked.When the CH2 Vertical POSmON cdntrol is pull ed and the inputsignal has the same phase, the waveform of ADD will be thedifference of amplitude (e.g. 4.2 DIY - 1.2 DIY = 3.0 DIY) .If the input signals have 1800 of phase difference, the two signalswill be the arithmetic sum of the amplitude (e.g. 4.2 DIY + 1.2 DIY= 5.4 DIY).

(5) X-V operationThe internal time bases are not used in X-V operation and the

deflections of both the vertical and horizontal directions are alloperated via external signals.Trigger switches and their associated controls and connectors areinoperative in the X-V mode.Proceed with the X-V operation as follows :I. Tum the TIMElDIY switch [22] fully clockwise to its X-V

positi on.Caution : When appearing as the spot without being swepts, the

spot would damage the CRT phosphor. As such, reducethe trace intensity to prevent it from becoming toobrigh L

( * 05-3060D: Press X-Y switch on the horizontal display [21 ))

2. If .you apply the vertical signal to the CH2, Y IN connector[ 10] and the horizontal signal to the CHI, X IN connector [9],

the trace appears.Then, adjust the trace to the proper brightness.

3. Adjust the trace height with the CH2 VOLTS/DIY switch [ 14] andthe trace width with the CH I VOLTS/DIY switch [ 13]. Adjust thePULL X5 MAG switches [ 15] [16] and the VARIABLE as needed.The TIME VARIABLE control [25] is measured when it remainspushed in.

45

4. If you wish to move the waveform verticall y rv axis). adjustthe CH2 Vertical POSmON control [ ISJ and adjust theHorizontal POSmON eonlrol [26J whe n you inte nd to move thewaveform hori zontally (X-axis) .(The CH I Vertical POSITION control [17] docs not opera te in theX-Y mode) .

5. The phase of the vertical (Ysaxis) signal can be inverted ISo'by pulling the CH2 Vertical POSITION knob [ ISJ.

(6) Delayed-time base operationTh e OS·3IXXIDSRS contains two axis. The A time axis start sweepimmediately up given with trigger, and B time axis starts 2nd timeaxis. Th ey are used to measure the complicated and horizontallymagnified waveform.CD Basic delayed sweep. For delayed sweep, proceed as follows

A. Set up the instrument for whatever vertical mode youdesire.

B. Make sure the B TRIG'D pushbutton is outC. Press the A INT HORIZ DISPLAY pushbutton. A section of the

tracevs) will brighten .<Note> Th e intens ified portion will be quite smaIl if

there is a large difference between the setting ofthe A and B TIME/DN switches .

D. Tum the B TIME/DN switch [23J until the intensifiedportion of the trace widens to an amount equal to theportion of the trace you wish to magnify (see Fig. 2-6(b) ) .

E. Tum the DELAY TIME PO S control [24J to position theintensification over the portion of the trace you wish tomag nify.

F. Press the B HORIZ DISPLAY pushbutton. That portion of thetrace intensified in Step 5 now appears as spreaded overthe full width of the CRT screen. The trace now displayedis being swept by the B timebase (Fig. 2-6Cc)) .

G. If needed, additional enlargement is possible by pullingthe A VARIABLE knob [25J for PULL X IO MAG.

-16

® Triggered B sweep

In bas ic de layed sweep, the B tirncaxis is not triggered by a

signal event, it begins when the main (A um ebase) sweep crosscomparate level scuing by DELAY TIME POS. knob. The only

problem with this is that mai n tirn ea xis jitter becomes ap parentin the B sweep at higb rati os of A to B TIME/DN switch setting( 100 : I and up).

To prevent th is, the B sweep can be triggered by the signalitself, or a time-relate trigger signa l. Th e DELAY TIME POS

control then determines the minimum delay time between A and Bsweeps : the actual delay time will be that plus the addi tionaltime until the next available trigger. The result is that

actual delay time is variable only with step resolution, inincrements of the interval betwen triggers.

Th e maximum magnification possible by thi s technique is severalthousand times. (CRT brightness being the limiting factor.

@ For triggered B sweep, proceed as follows :

A. Set up the scope for basic delayed sweep as described inthe preced ing para graphs.

B. Press in the B TRIG'D pushbutton [21], and adjust the

Tri gger LEVEL co ntrol [3oJ if necessa ry. Th e B timeaxis isnow triggering on the same trigger signal as the A

timebase. Th e stan of B sweep will always be a leading or

trailing edge of the trigger signal : turning the DELAYTIME POS control will not change this.

,)7

a. A TIM EBASE DISPLAY

INTENSIFIEDPORTlCN OfA SWH P

b. A IN TENS IFIED BYB DISPLAY

C, B TIME BASE DISPLAY

~

'f, ,

l ..

T

, . . .,PH ~1 , ... ( , ,

7

1 ,,,, ,

, ,,

, ,, ,

'I'

Fig. 2-10. Sweep magnification by B time axis

2-2-5. Digital storage function

Digital storage function operates in the following sequence :(j ) NORMAL storage mode (NORM)

CD NORMAL storage mode (NORM) displays the waveform to be stored

in the real mode.(%) Press storage switch.Q) Waveform sweeps all the trigger devices depending on the

setting of adjustor in the front size. The waveform to bestored is displayed on the CRT. It sweep speed is low, theretrieval and display of waveform require more time . It takesabout three seconds to retrieve and display waveform in thesweep range of 0.1 s/div. Trigger signal is generated after

that time.If sweep speed is low, therefore, waveform is not displayed onthe CRT immediately upon adjusting the adjustor on the fron t

side.

® When TIME /DIV fadjustor is between 51'S /div and 0.2s /div the intermittent andrepeated waveforms may be stored.

® Pressing HOLD switch in NORMAL STORAGE mode stops the correctionoperation by CRT display, and the CRT display stops.

(2) Equivalent sampling mode (EQUIV)When TIME / DlV switch is set between 0.21'S / div and 21'S / div.I * OS-:\OWD:0.1~/div - 2~/div) The repeated waveform can be stored in theEQUIV mode. Pay attention to the followings in this mode:CD The edge initially rising or dropping in trace (left end) may not be displayed

in the repeated mode range. In this case, measure the rising or dropping edgeof waveforms appearing after the first one.

49

In thi s case, measurethe risign or droppingedge of waveformsappearing after thefirst one.

I

17 1/

Gt-,

)V -fl- I I"

I---f\

The edge initially /rising or droppingin trace (l eft end)may not be disp layedin the repeated mode

range .

Fig. 2-11. EQUIV mode

@ It takes longer than 5 seconds to store input signal below 1kHz

(for 200Hz input) .® The noise may be included when stori ng low freque ncy signal. It

is desirous to use spherical wave with rising time sho rter thanO.3~s or sine wave with frequency higher than lMHz.

Note : Sampling rate in storage mode :When there is no horizontal magnification in storage mode,total horizontal scale of IOdiv. on CRT is composed of 1000

sampling da ta.

so

(3) ROLL modeThe displayed waveform flows to the left from the righ t.Correction point for new da ta and ROLL mode make it easy to measurethe signal lower tha n 100H z or so. To stop the ROLL mode, pressHOLD switch to hold the fina l waveform on CRT.

<CRT

a

oint for

•

(~I ."I \ II \ I 1\ 11\ I · ,

• • •· \ I \ I \ I \ I \ I • \ T .\ · •. • \ IJ \ 11 \ 1 \11 ! ngger P\) 'II

new data.

New datxisting da ta Stored dataE

Fig. 2-12. ROLL mode

Note a) ALIASING distinctionIf the input signal having frequency higher than a halfthe sample clock frequency is added in the sweep rangewhen measuring signal in storage mode (NORM, AVG ),ALIASING occurs.In this case, the waveform obtained by sample clockfrequency from the input signal frequency is displayed.This waveform may be regarded as correctIf ALIASIANG is doubtful, convert into REAL TIME mode to

check whether it is same as the operating mode displaybeing measured.It ALIASING occurs, the waveform of NORM mode (i nputsignal frequency - sampling clock frequency) is displayedwith its top and bottom section nearly flat. So it ispossible to decide ALIASING in consideration of thedifference between these two displa ys.

SI

b) ROL L waveform correctionROLL mode is possible in high speed ran ge ( up toO.5s/d iv.l . If vertical mode is set to DUAL, thewaveform docs not move smoothly at O.Ss/d iv. which occursdepending on the relati on between the waveform da ta anddisplay rate . In reality, the waveform is normal.

(4) Single opera tion in NORM mod eWith storage mode set to NORM, pressing SING LE switch performs

NORMmode srnapiin g, and renews the waveform on the tube surface. Thenit automatically converts into HOLD state.Q) SING LE opera tion procedure

a) Set storage mode to NORM, and adjust the adjustor knob tostore and display input signal in the operation mode.

b) Set trigger mode switch to NORM, and set trigger level tosuch a location as suitable to measure input signal.

c) Press SINGLE switch@ Pressing SINGLE switch converts into input signal trigger

standby state. Wh en trigger signal is applied, the SINGLEsampling is carried out. The SINGLE switch LED continues tolight up when the input signa l trigger is not detected. If

trigger signal is applied or trigger mode is set to AUTO,SIN GLE switch LED goes out, and automatically converts intoHOLD state. (Hold LED lights up ) .

® When trigger mode switch is set to AUTO, SINGLE treatment isperformed if inp ut signal is not triggered. So the DC signal

ca n be measured in thi s mode.@) Wh en trigger signal enters in N.ORM mode, the NORM sampling

occurs for the waveform data corresponding to one tube surface,and all the data renew the tube surface into new waveform data.This fun ction is effective in storing the ins taneous waveform.Note : SINGLE does not operate in averaging, ROLL, EQUIV or MAG

state. When vertical mode is dual (ALT), CHI (o r CH2)performs signale operation.

(5) HOLD mode

Pressing HOLD switch in EQUIV, NORM or ROLL mode sets HOLD mode.

In thi s mode, sampling opera tion stops in each operating mode.When mode enters into HOLD mode, the waveform display data arecontinuously displa yed. When the waveform data displayed after HOLDmode are set, the waveform data can not be moved vertically.

(6) SAVE operation (SAVE)Th e waveform data sampled and displayed in storage mode can bestored in the storage memory. Data which .are stored in the storagememory can be displayed on the CRT.SAVE operation

(D Use SAVE switch to set the storage memory concerned.@ Sampling data are displayed in storage mode. Press HOLD switch

to stop waveform.@ Pressintg SAVE switch saves the suspended waveform in the

storage memory.CD When storage switch LED lights up instantaneously, it means

that waveform is stored.® When vertical mode switch is set to CHI . CH2 or ADD, waveform

is stored storage memory A and B in tum whenever pressing SAVEswitch. Wh en vertical mode switch is set to DUAL, CH I waveformis stored in storage memory A while CH2 waveform is stored instorage memory B.

(7) Storage memory display (RECALL)

Th e detail s stored in storage memory in HOLD mode are displayed onthe CRT in next operation, and comparable with current waveform.(D Pressing thi s switch once, recall switch displays both the

waveform stored in storage memory A and the set valu e (V/div.and TIME/ON) regardless of vertical mode switch . Pressingthis switch Once more, the waveform stored in storage mem ory Bis displayed. Pressing this switch one more time displays boththe waveform stored in storage memory A and B and the setvalu e.Pressing th is switch again erase s displayed waveform and set

value.

@ The waveform data displayed in storage mode cannot be movedvertically.

53

(8) x-v plotter output ( PLOT )Waveform displ ayed in HOLD mode is sent to X-V plotter throughRS-232C by pressin g PLOT Sf\V.(PLOT switch operates only in HOLD rnod e.)Refer 10 item 3 for more details.

(9) Horizontal magnification displa y (Ti me axis MAG)Th ere are two horizontal maganification meth ods in storageoperation:I. Magnification (X IO) by XIO MAG switch.2. HOLD waveform magnification by TIME/DIV.(I) XIO MAG

Displayed waveform magnified ten times from the center oforigi na l waveform in the tube surface storage.The waveform which is slored in save memory can not bemagnified.Gi) Pulling XIO MAG switch displays ldiv. sector magnified ten

times from the center of original waveform.lIE If it is displayed on both sides of CH I and CH2, the

Idiv. sector magnifie s ten times from the center of CH Iand CH2 original waveform .

Original state Magnified state

CHI

CH2

Fig. 2-13. X10 MAG

5-1

(j)) Wh en switch is released by pressing X IO MAG switch, itreturns to the original wavefo rm.

(2) HOLD waveform magnifiaction using TIME/DIY switchWhen storage waveform is displ ayed on the tube surface in HOLDmode, manipulating TIME/DIY switch makes it possible to

contin uously magnify and displ ay up to ten times the TIME/DIYswitch set value. Magnificati on is done from the center oforiginal waveform as in ( I) .

[ Example of magnification operation]Gil Display the original waveform and set HOLD mode.(j)) Turn TIME/ DIV switch clockw ise to change TIME/DIV to rapid

set value. When TIME/DIY set value is cha nged on the tubesurface waveform is magnified as correspond ing to the setvalue.

55

(i) OriginalTIMEIDIV l ms/di vHOLD mode

(ii) Rotating TIME / DIYswitch. it magnifiestwo times with TIM E/DlV = O.5ms/d iv.

(iii) Rotating TIME / DIY agamswitch, it magnifiesten times with TIME/OlV = O.5ms/d iv.

CH1 fV\II.NVINIMCH2 JLWJUUULU

CHI fV\NV\CH2 .JLJLJUUL

CHI~

CH2 -FL

Fig. 2·1. HOLD waveformmagn ification

@ This operation performs horizont al mag nification up to tentimes. Therefore TIME/OlV switch can set a tenth theorigina l waveform. But TIME/ OIV display is not cha nged andwaveform is not magnified any more even if you turnsTIME/OIV clockwise beyon d that extent

@ When magnification is displayed, the magnification rate isgrad ually reduced and returned to the original waveform byselling the TIM E/OlV set switch to the slower side whileturning TI ME/OIV switch counterclockwise.

) 6

( 10) Interpolation

As the horizontal magnification rate increa ses, sine wave loo ksstepwise and pulse wave goes ami ss.

In this case, interpolation ma kes it easy to watch the wavefo rm.

Interpola tio n is divided into linear and sine in terpo lat ions .

Every time you press MEN U selecto r switch, int erpolation selectionfunction conve rts as follows :

---> Lin ear interpolation ---> sine interpolation ---> no interpolation

Th e current interpolation mode is indicated as symbol on the sweep

sweep factor on the bottom right of tub e surface. Selecting

linear/sine interpolations makes pul se/sine wave of input signalclearly displayed on the tube.

(j) Indicate th e original waveform, and set the HOLD mo de.

(2) Carry out horizontal magnification display using XIO MAG or

TIME/DIY. switch, and have the waveform to be interpolateddisplayed on the tub e surface.

(Refer to (9) horizontal magnification display for horizontal

magnifi cation operation).

(3) In (2), interpolation proceeds in the following sequence

whenever pressing INTERPOLATION switch.

Lin ear in terpolation ' Sin e interpola tion

Fig. 2-15 Interpolation

57

,

'-

No interpolation

In X I() MAG magnilication, pressing X I() MAG after interpolationstops interpolation and norma l magnifica tion display entersinto effect.In norma l magnification , pulling X10 MAG after interpolationstops interpolation and X10 MAG magnification display entersinto effect.

(II) ALT MAG modeAn original waveform and magnified waveform arc displayed simultaneously.When awaveform of CH I displayed and ALT MAG mode is selected,the original waveform and its maguified waveform are displayedsimultaneously.To perform the ALT MAG display of a waveform of CH2, set the verticalmode 10 CII2 first, and then set in the ALT MAG mede.

VERTICAL~IODE NORMAL DISPLAY ALT MAG

ClII CIII WAVEfORM CHI original waveform / CHI magnified. waveform

CII2 CIJ2 WAVEFORM CHZ original waveform I CH2magnified waveform

DUAL DUAL(CHl . CH2l DUAL(CIII , ( 12) original waveformWAVEFORM I DUAL (ClII +CH2)magnified waveform

ADD ADD(CHl +CIJ2) ADD(ClI l + C1I2) original waveform

WAVEFORM I ADD(CIIt + CIJ2) magnified waveform

EX) ALT MAG OPERAT ION (CII I)I) ScI the vertical mode 10 CH I first, and displayed the waveform of CH I2) Press IIOLD switch to stop waveform,3) Use MENU switch 10 ser ALT MAG mode and then select ALT MAG on.4) Manipulating TIM E I DIV switch makes it possible to continuously magnify

and display up to ten times the TIM E I DIV switch set value,S) Move the CURSOR 10 a magnified point by the MAG POINT cursor6) The magni fied waveform is displayed at approximately 3div below

the original waveform

Initial

rig. I - I

Magnified

f- :

l-

e ll I original waveform

CH1 magnified waveform

5X

(12) GO-NOGO mode

The GO-NOGO judgement func tion is used to judge if te acquired signal is in thejudgeme nt domain (Boundary) sei on the CRT scree n.

TI,e input signals acquired in sequence are compared with the boundary,When the results satify the conditions (CO MPARE. HO LP ). these processing

arc performed automatically.

Thi s function is used to monitor ahnonnal phenomena which will occur not so

frequently, or to detect undesired samples which will output sign las differentfrom the reference signal.

GO - NOGO OPERATION

I) GO-NOGO is performed by limited co nuitio ns please co nfirm the operating

co ndition. (The mode AVERAGI NG . ROLL, MAG. DUAL, SING LE,RECALL other than operating) .

2) Use MENU sw itch set GO-NOGO mode.

3) Se let the condition to issue GO -NOGO from the following two option.

<D Wh en a waveform is out of the judgement domain

® " is onl y co mparing4) Usc MENU selector switch se t G O-NOGO judgement domain.

pressing MENU selec tor sw itch changes mode in the follow ing seq uence.O.4div --7 O.8di v --7 1.2div --7 O.4div

5 ) To perform GO-NOGO operation, press RCALL Switch6) XH : Compari ng waveform in the judg me nt dom ain

OH : If the resul t waveform is out of the judgme nt do mai nHolds a waveform on the scree n.

operation

II I

"'"I II

''j;,I

(13) MENU mode

Fig. 1-2

59

rcsull s(HOLD)

I

- ,I

I, ,

I • ~ . 1/I j-> I 1'-(I I

Using MENU switch. it is possibl e to set interpo lation. waveformsmooth ing ON/OFF in average horizontal magn ification wheneverpressing MENU switch. [ PROB], [ SMTH], [AVG], [ ROLL] and [ ITPL]appear on the top of CRT one by one and LED lights np.Pressing the switch aga in release s MENU mode, and LED goes out.<D Probe factor selector mode (PROB)

When MENU LED ligh ts up and [PROB] is displayed on the topright of CRT, you can select PROBE factor.

XlXIO

I X PROBE10 X PROBE

Using menu selector switch, it is possible to select XIO/XImode.

@ Smoothing selector mode (SMTH)

When MENU LED lights up and tSMTH] is displayed on the topright of CRT, SMOOTHING turns ON/OFF.

rs-r ~ -r ~ -r ~ -r - -r - -r - 0- r ; -r -F-1l _ _ L _ _ L __ l _ _ L _ _ L __ l _ _ l __ l _ --.J

IT OFF : ~l SMOOTHING

ON : SMOOTHING

In OFF state, storage waveform is displayed in dots.Turning it ON, the dots are connected to display smoothwaveform. If sampling frequency is low in connectio n with inputsignal (when signal with more than 5 cycles per each sector) ,it is displayed with amplitude low. In this case, setsmoothing mode to OFF to display the waveform with amplitude

similar to that of input signal.

60

Q) AVERAGING setting mode (AVG)

Wh en MENU LED lights up and [AVG] is displayed on the top

right

of CRT, the number of averaging operations can be set.

NORM

4

1664

256

The number of averaging operations is changeahle using MENU

selector switch . Pressing MENU selector switch changes NORMfrom 4 Ibm 256.The average waveform is displayed after data is obtained for

the set sweep number. The average of next data is ohtained inthe number same as the number of sweeps, and the averagewaveform display is corrected.

Thus it is possible to detect non-repetitive signal under theinfluence by non-trigger noise.

The number of averaging operations is same as the set average

number. In ROLL mode, no averaging operation is carried out.

61

<D ROLL selector modeWhen MENU LED lights up and [ ROLL] is displayed on the topright of CRT, ROLL ON/O FF can be selected.

r ~ -r ~ -r ~ -r ~ -r - -r - -r -0- r ~ -r - -1l __ L __ L __ L _ _ L __ l _ _ L __ l _ _ L _-J

ONOFF

ROLL ON/OFF is carried out using MENU selector switch.

® Interpolation selector mode (ITP L)When MENU LED lights up and [ ITPL] is displayed on the topright of CRT. you can select interpolation.

OFFSINLIN

Mode is selected using MENU selector switch. Pressing thisswitch changes mode in the following sequence :LIN ..... SIN ..... OFF ..... LINInterpolat ion is 10 in terpolate the magni fied waveform datawhen magnifying the display waveform horizont ally (excludingstorage waveform) . In OFF position , waveform is magnifiedhorizontally. In SIN position. the initial waveform becomessimilar 10 sine wave. If the square wave is connected in thisstate, considerable ranging takes place. and the displayedwaveform looks different from the input waveform. In thiscase. set switch to LIN from OFF. In LIN position, data areinterpolated line arly and waveform is displayed more smoothlythan in OFF position .

Note In SIN position, set the amplitude of input signal below8 DIV on CRT. If any signal with large amplitude isconnected on the CRT, tortion is observed in the top andbottom sector of waveform . After waveform stops in ROLLmode, the interpolation operates depending on theselection between MAG XIO mode and TIME/DIV. If ROLLwaveform does not stop, both the MAG XIO andinterpolation modes do not operate.

® ALT MAG selector mode (AMAG)When MENU LED lights up and [AMAG) is displayed on the top rightof CRT, you can select ALT MAG.

TOFF : ALT MAG OFFON : ALT MAG ON

ON / OFF can be selected using MENU selector switch.® GO-NOGO selector mode (G-No)

When MENU LED lights up and [G-NO] is displayed on the top rightof CRT, you can select GO-NOGO.

I) r----.-----.--,----.-,---.-----.-~~-,_~~

TXH : COMPAREOH: HOLD

XH /OH can be selected using MENU selector switch.

2) IF XH mode (or OH mode) is selected,

~ ~T

O.4<1iv : JUDGEMENT DOMAIN 0.4<11'0.8div :JUDGEMENT DOMA IN O.8<l1v1.2dIV :JUDGEMENT DOMA IN 1.2dIV

Pressing MENU selector switch changes mode in the following sequenceO.4div ---> O.8div ---> 1.2div ---> O.4div

6.1

® Menu display in the mode " the than MEN U modeIn the modes other than MEN U, the setting information of the number ofaverage and the smoothing is displayed as follows.

t;mOOthing onBLANK :Smoothing off

[SA: SAVE Memory ASB : SAVE Memory B

[

BLANK:NoIaverageAV4:4times of averageA V 16:16times of averageAV64 :641imes of averageAV256:256times of average

EQUIV :EQUlVALENT SAMPLING(0.2J.o/div(60MHLO.IJ"Jdiv) to2",1div)

NORM : NORMAL SAMPLING(5",1div to0.15 1div)

ROLL :ROLL MODE(0.5s1divto0251div)

(\ 4) X-Y operationThe internal time axis is no t used for ,X-Y measureme nt.X-V operation is carried out as follows :I. Set the vertical mode selector switch to DUAL.

(If it is set to CHI, CH2 or AD D, erro r may OCCUR) .2. Pressing HOLD switch in EQUIV, NORM or ROLL mode enters into

HOLD mode. Th en sampling operation stops whil e waveformdisplay data arc displayed cont in uously.

3. Turn A TI MEIDIV switch [ 22J completely clockwise to X-Vposition. ( * OS-3()('()D: Set horizontal mode " lector switch to

X·y)( Note) :If it is displayed in dots and not deflected, the

fluorescent surface of CRT may be damaged. If the

brightness is to high, lower it.

65

2-3 M EASUR EMENT APPLICATIONS

Thi s sectio n co ntains the measu rem ent procedures app lying basic functio ns

of th is instrument. OS-302(J().Though only some of them arc introd uced, we assure you that a variety ofspecific measurement can also be performed based on the said functions.As the measurement applications set out herein are the impo rtant andessential particulars, it is desirab le for you to make yourself familiarwith those ba sic operating procedures while you use the oscilloscope.

2-3-1. Amp litude Measurement

Th e latest trigger sweep osc illoscope ha s two major functions.Th e first of these is to measure the amplitude.It is practicable to perform all the measurement with the oscilloscope

ranging from th e simple waveforms to the complex ones.The oscilloscope in general ha s two different voltage measurements,namely peak-to-peak (1'-1') measurement and instantaneous peak-to-peak

(1'-1') measurement.Instantaneous voltage measurement is to measure the voltage of eachpoint on the waveform from a ground reference.In order for you to perform the aforementioned measurements exactl y,make sure that the VARIABLE controls are fully turned clockwise.( J) Peak-to-Peak (1'-1') Voltage Measurement1. Set up the vertical mode switches of the osc illoscope in the same

ma nn er as tha t set out in 2-2. BASIC MEASUREMENTS.

2. Adju st the T IME/D IV switch [22 1in such a manner as to form a

waveform of as many as two or three cycles a nd the VOLTS/OIV switchshall he so adjusted as to ma ke the waveform be on the CRT screendisplay.

3. Adjust the Vertical POSITION controls 1171 and [ IXI properly andmake the end of the waveform align with the horizontal grar icu lcline of the CRT screen display. (See Fig. 2-7).

4 . Adju st the Horizontal POSITIO N contro l 1261 and make the end of thewaveform be on the central vertical lin e of th e CRT scree n displ ay.(Thi s line is graduated in 0.2 scale divisions) .

66

5. Co unt the number of divisions of bo th the top a nd bottom of thewaveform and mu ltiply the resulta nt number by the value of the

VOLTS/DIV switch. th us result ing in the pea k-to-peak voltage.For example, if the value of the VOLT S/D IV switch was set to 2V whenthe waveform same as that shown in Fig. 2-16 had bee n measured, it

wou ld in fact be 8.0 Vp-p,

(4.0d iv X 2.0V= 8.0V)

6. If the indicat ion of the vert ical magn ification is X5, divide themeasured value by 5.However, if the probe is 10:1, mu ltipl y the voltage by 10.

7. Wh en measuring a sine wave below 100Hz or a squa re wave below 1KHz,set th e AC-DC,GND switches to DC.

CAlITIO N : Where th e waveform is loaded with the high potential DC

voltage, the above measurement is difficult.

At thi s time , perform the measurement with setting theAC-DC,GND switches to DC.

(Wh en the mea surement of AC com ponent is needed) .

: For any instrument equipped with readout function, movin

cursor to the top and bottom of waveform displays thepoten tial difference V on the screen.

( 2) Instantaneous Voltage Measurement

1. Set up th e vertical mode switch of the osc illoscope in the sa memanner as that set out in 2-2.BASIC MEASUREMENT above.

2. Adju st the TlME/D IV switch [221 or [23I so as to becom e a completewaveform ' and set the VOLTS/DIY switch to produce 4 to 6 divisions(See Fig. 2- (7) .

3. Set the AC-DC,GND switch (I I) or ( 12) to G ND.

4 . Turn the Ver tical POS ITION contro l [171 or [ 18] and make it align

with either th e lowest cen tral horizontal gra ticule line ( in case of

positive (%) signal) or the up permost one (when the signal isncga tive f-) ) .

NOTE : The vertical POSITION controls must not be touched until themea sure men t is completed.

67

5. Set the AC/Gt'O/OC switch to DC.If the sig na l is positive ( ,1 ) . th e waveform appears abov e the gro und

refe rence lin e and wh ere the signal is negative (- ) , the waveform

appears below the ground referen ce lin e.

CAlJrION : Wh ere the DC volta ge is relatively greatly loaded co mpa red

wi th the wave form, then mea sure the AC portion separately

from others with selling th e AC-O C,GN O switch to AC.

6. Make the point yo u wish to measure align with the ce ntral vertical

gratic ulc lin e on the C RT screen dis play by movi ng the Hori zontal

POSIT ION contro l lZo].

Since the centra l vertical gra tieulc is gra duated in sca les at every

0.2 division, the mea surem ent is easy to perform.

In the exa mple cited for Fig. 2-7, if the VOLTS/OIV switch is

posit ioned at 0,5V, the value becomes 2,5V (5,0 div X 0.5V= 2.5V) .

7. I f the X5 ma gnified movement is performed, divi de the value measured

in paragraph 6 above by 5 and where the XIO PROBE is used, multiply

the resultant value by 10.

8. After setting READ OUT cu rsor (X) at the G NO level, positioning 1:0.

curso r (+ ) to the waveform to be measured di splays the instantaneousvoltage on the screen.

68

.l : I I I iI .

~Ll , i i

( 1\ \ ! I 1\ I ,I

\ 1\ I

I .I

J )I \

i

i 1 $

T>H

o.,

Fig. 2·16. PEAK·TO·PEAK VOLTAGE MEASUREMENT

I5 DIV

~

.l!

I

11I I

I

III~ REFERENC E LINE

VE RTIC AL

DISTANCE

Fig. 2·17. INSTANTANEOUS VOLTAGE MEASUREMENTS

69

2 -.3 -~ . Ti me Interval Measu rem ents

The second most important measurement o f the synchrono us-sweeposcilloscope is the very measurement of time interval.Since the divisions uni formly ma rked on the CRT screen are allcalibrated to the time bases. the time interval measurement ispracticable,

(I) Basic TechniqueTh e basic technique for measuring time interval is described in thissection. In addition. characteristics measurement and variationtechnique using this technique will be helpful. if you apply thefollowing procedures:

I. Set up switches in the same manner as that described in 2-2-4., Set the TIM E/DIV switch [n ] in such a manner as to make the

\\ aveforrn appear on CRT screen display as large as possible.Tum the TIM E VARIABLE contro l [25J fully clockwise until beingclickstopped.

Otherwise you so do. the measured value will be inaccurate. thusrequiring you to exe rcise due care.

3. Adjust the Vertical POSITIO N controls [17] and [ 18] and make thewaveform you wish to mea sure align with the central horizontalgrati cule line.

-+. Turn the Horizontal Position control [26] and make the left side ofthe waveform correspond to the vertica l graci tule line .

5. Cou nt the number of graticule divisions up to the point you inten dto measure. Horizontal central line is graduated in divisionsranging to 0.2 division.

70

6. If you multiply the value measured in Item 5 above by the value setby the TIM E/DIV switch. the time you wish to meas ure will beobtained. If the T1MEIV RIAI:lLE knob 1251i, pulled (X I (J magnifi ed

mode) . divide the measured value by 10.(2) Period . Pul se Width. and Duty Cycle MeasurementIf you make good usc of the measur ement based on the basic tech nique.you can also measure the perio d of pulse, pulse width , and dury cycle,etc. When a complete period of pul se of the signa l appears on the CRT

screen display, the period of pulse of tha t time can be measu red.For example, if the TIME/D IV switch were .set to lOms, the measured valueof one cycle between A and C in Fig. 2-9 would be a waveform havin g aperiod of cycle of IOmsX 7= 70ms.The pulse width represent s the time between A and B.In Fig. 2-IS, it is 1.5 division so that it becomes 1.5div X IOms=15ms. However, in this example, as an 1.5 division is a rather shortdis tance, should you set the TIME/ON switch to 2ms, it would be seenmagnified as shown on Fig. 2-ISb.Th en , though the pulse is short, the measureme nt accuracy becomesincreasingly better. Wh ere it is still disp layed small even withadjusting the TIME/DN switch, it is advisa ble to perform themeasurement under XI O magnified condition by pulling the A VARIABLE knob

(25) .

When pulse width and period are known, dury cycle can be calculated.Duty cycle is the percentage against ON-time of the pul se period ( totalof ON-and OFF-time) .

In Fig. 2-IS: the duty cycle is as follows :

D ty I (%) = Pulse width X 100- A Bu cyc e Period - A C

(e. g) Duty cycle (%)= j~:~ X 100=21.4 %

X 100

lit Measure the cycle by moving cursor. Th en measure the pulse width .Th e du ry cycle of required waveform is obta ined by applying themeasured value to the formula.

7 1

A 8 c A 8

(a) r oms DI v IS ION

r~~T-~l I I Ii ,

, I I

! i1 I.1

f-t-....+ •1-++1 1 +1 ~'H •

i

'r

Ilb) 2mS DI v IS I ON

Fig. 2-18. TIME INTERVAL MEASUREMENT

2-3-3. Freq uency Measurement

Whe n an accurate measurement is needed, a frequ ency counter sha ll beused. If you have the frequency cou nter connected to the CH I OUTPUTconnector [20] on the rear panel of the oscilloscpe, you will enjoy the

convenience and advantage to perform both the waveform observing andfrequency measurement simultaneously. However, when a frequ ency counter

is not available, the oscilloscope can di rectly measure the modulatedwaveform that can hardly be measured by means of a frequency counter, orthe waveform bearing a lot of noise. Frequency is interrelated to theperiod. First of all , in brief, you can simply obtain the frequ ency bycalculating with I/t assuming that you' hav e already known the period tappea ring in section 2-3-2 Time Interval Measurement. With applying theformula of 1/t. when period is depicted in seconds, the frequ enc y is

HertzrHz) ; period in milli secondsvms) yields frequ ency inkilohertzCkf-lzr . period in microseconds (IlS) yields frequency in

rnegahertz t.Ml-lz) .The accuracy of frequency is determined by an accurate calibration of

the timebase and careful measurement of the period.

72

2-3-4. Phase Difference Measurements

Phase difference in phase angle between signa ls can be measured usingthe du altrace method of phase measurement or Lissajous diagrammaticmethod of ph ase measurement in the X-Y mode of the oscilloscope.(J) Dual-trace MethodThis method works with any type of waveform . Even if the waveform s aredifferent from each other or the phase differen ce is great, themeasurement up to 20MHz is practicable.Measurement shall co mply with the following:1. Set the switches as described in 2-2-4 Dual-trace Measurement.

Connect one signal to the CH I IN connector 191 and another one tothe C H2 IN connector 110]

NOTE : Where the frequency is becoming higher, usc the same probe orthe cable having an equal delay time so that an measurementerro r can be reduced.

2. Position the Trigger SO URC E switch 1281 toward the stable waveform .

At this time, move another waveform upward or downward by adjustingthe vertical POSmON control so as to make the said waveforminvisible.

3. Move the waveform to the center adjusting the vertical POSITIONcontrol, and make the waveform occupy 6 divisions.

4. Adjust the Trigger LEVEL co ntrol130J and ensure that the beginning

point of the waveform corresponds exactly to the starting point ofthe horizontal graticule line (See Fig. 2-19).

5. Adjus t the TIM E/DIV switch 122J TIM E VARIABL E co ntrol 125], and thehori zontal POSITION control 126] properly so as to make one cycl e of

the waveform become 7.2 divsions. When this is done, each majorhorizontal division represents 50° and each subdivision represents10°.

6. Perform the same procedure as that described in Item 3 above so asto have another waveform already moved to be invisible alsodisplayed on center of the horizontal graticule line.

7. The horizontal distance between the beginning points on thehorizontal axis of two waveforms is the phase difference. Forexample, the phase difference shown in Fig. 2-10 is 5.2

divisions, hence 60°

73

S. If the phase difference is less tha n 500. the measurement can beperformed closely using X IO magnificatio n mode. In this case. notethat o ne major division represen ts 5° .

9. For any ins trument equ ipped with READOUT func tion. measuring T

value after moving cursor as sho wn in the figure makes it possibleto measure th e ph ase difference in the en tire cycle.

(2) Lissajous Pallem MethodThis method can only be used where the waveform is sine wave.

Measurements ca n possibly be performed at frequencies even higher than500KH z depending on wide band width of the amplifier. However, in order

for you to maintain the maximum accuracy provided in features. it isdesirable to conduct the measurement at the phase difference less th an

20kHz.

7-1

L IT v-,1\ 1/f-- -- [\f--lfV \

I I

1\ 1\ 1/ II/ : / \ x

J,

1/, -r-r-

1\ 1/ II, 1\ ''Li.

,~ }, J- -

"I - ,,I

~~ I

Olff ( k( f(; ( I7 zoiv 360' --,

Fig, 2-19. DUAL-TRACE METHOD OF PHASE MEASUREMENT

I•I

,1 !,. 1./)~ - j

1/ V1/ V

1/ 1// t>

ru 1/.:;.:V,1

I,L

PHASE DIFFERENCE( angll! () = son - I AB

( a) PHASE ANGLE CALCULATION

/0 0 \:j-,O' .,. OJ' ,,,. reo-

(b) LlSSAJOUS-PATIERNS OF VARIOUS PHAS E ANGLESFig. 2-20. LISSAJOUS METHOD OF PHASE MEASUREMENT

75

Phase difference measurement shall comply with the following proce dure:I. Rotate the TIME/D IV switch fully clockwise and set it to the X-Y

position.CAUTION: At this time, the trace on the CRT screen is so bright

tha t it could often damage the CRT ph osphor. So reduce the

trace intensity properly.2. Make sure that CH2 POS ITION [I X] and PULL X5 MAG knob r161 arc

pushed in.

3. Co nnect one sig nal to the C H I, X IN con nector 19 J, and anothersignal to the C1I2. Y IN co nnector [l O],

4. Center the waveform by adjusting the CH2 vertical POSITION control

[ 18). and adj ust the CH2 VOLTS/DIV switch [14J and VARIABLE control[ 16) together so as to make the wave form become 6 division s (thewaveform ex ists on the 100% and 0% graticule line).

5. Adjust the CH I VOLTS/DIV switch 113]. and VARIABLE to make thewaveform become 6 divisions as done in Item 4 above.

6. Precisely cen ter the waveform to have it exactly positioned right onthe horizontal center by adjusting the horizontal POSmON control

1261 .7. Count the number of divisions indicated by the waveform along the

central vertica l graticule line. You may count movin g the waveformby means of the CH2 posi tion control for close measurement.

8. The ph ase difference of the two signa ls ( angle e) is equ al to thea rc sine of A B ( the number divided by 6 in Item 7 above) . Fo rexample, when the waveform is same as the described in Figure 2-20a,if you perform the calc ulation acco rding to Item 7 above, theresultant is the arc sine value of 2+6= 0.3334.which is converted into 19.5° in terms of'the angle.

PHASE DIFFERENCE (angle 8) =sin - ' ~

9. The simple method can directly be applied to angles less than 90°.As for angles greater than 90°, add 90° thereto. So that you arerequired to determine its value with referri ng to various ph aseangle indicated in Fig. 2-1I(b) .

NOTE : Th e conversion of sine an gle can be obtained in accordancewith trigonometric function table and trigonometric function

expression.

76

10.For an y ins trument equipped with READOUT function mcasuriug A and Bvalues after moving cursor as shown in the figure makes it possibleto ca lcula te the phase difference (8) .

2-3-5. Risctime Measurement

Rise time is the time req ui red for the Icadi ng edge of a pul se to risefrom 10% to 90 % of the tota l pulse amplitude. Fallti rnc is the timerequired for the trai ling edge of a pul se 10 drop from 90% of the total

pul se amplit ude to 10%. Risctime an d falltime, which may becollectively called tra nsit ion time, are mea sured essen tially in thesame manner.

To mcasure rise and fall time, procccd as follows :

I. Connect the pulse you wish to measure to the CH I IN connec tor (9 1,and set the AC-DC,GN D switch III 1 10 AC.

2. Adjust the TIME/DIV switch [::'::'1 to display abo ut 2 cycles of the

pulse. Make sure that the T IME VARIABLE co ntro l 1::'51 is rotatedfully clockwise and pus hed in .

3. Cent er the pulse vert ically by adjusting the CH I vertical POSITION11 71·

4. Adjust the CHI VOLTS/D IY switch 1131 so as to make top of the pulsebe closest to the 100 % graticule line, and th e b ottom of the pul sebe closest 10 the 0 % line. Where the corresponde nce is not ma de,then rotate the VARIAB LE control [ 15J slightly co unterclockwise with

making graticulc lines of bo th sides dev iate a little to make theboth pu lse peaks rest exactly on the 100 % and 0 % graticule lin es,respectively. (See Fig. 2-2f) .

5. Adjust the hori zontal POSITION control 126 J and makc the rising edgerest on the central vertica l graticule lin e (crosses at the 10%

point) .

6. If the risetime is sloa s compa red to the peri od, no furthermagn ification is necessary. If, however, the risetim e is as sho rtas to co rres po nd almost to the vertical graticule line, make an

adjustment as described in Item 5 above by pulling the TIME

VARIABLE/PULL XIO MAG control [251 (See Fig. 2·21(b)).

77

7. Co unt the number of horizontal divis ion s between th e 10% point

(central venieal graticule line) and the 90 % point.8. Multiply the nu mber of divisions counted in Item 7 ab ove by the

numerical value of the TIME/DIY switch, the n you wiU obtai n themeasured rise time. Wh ere the mode is XI O magnifica tion, divide the

value of the TIME/DIY setting by 10. For example, if the TIME/DIYswitch was set to Ips, and the measurement was co nducted as sho wnin Figure 2- l la, the risetime would be 360ns. ( IOOOns -=- 10 = lOOns,l OOns X 3.6div = 36005 : because the mode is XIO magnifica tion) .

9. Wh en measuring Ialltime, simp ly make the 10% point in fall time

a lign with the central venical grat iculc line, and perform themeasure ment conforming to the procedure sel out in Items 7 and 8

above.

10. When measuri ng the rise and fall time. note that 17.5ns-Rise lime (tr)=O.35/f-.'JH which is

transi tion time is contained in the OS-30:20D oneself. Therefore the real transition time uc) is

cOIllJX)SeJ of measure transition time (tnu and tr ,

The above all is explained with the followin g formula:

Ic = Real transition timetm= Measured transition timetr - Rise lime of osci lloscope

tr = 17.5ns: 05-30200tr = 8.8ns: 05-30·100tr = 5.8ns: 05-3()(,(J0

* For the instru ment equipped with READOUT function, positioningcursor and 6 cursor to 10% and 90 % respectively makes it possible

to mea sure rise/fa ll time.

78

r:l" n .u • 10QQf-s - f-o.I• r-:

... +-+ •••+...\..

I

i q H ~m

io . b ~

. r I

a. BASIC DISPLAY SETUP

,1 " ... """ r: :-... ... . a

I i•

.. 1IC 1 ~.. « .b"

b. WITH HOPIZONTAL MAGNIFICATION

Fig. 2·21. RISETIME MEASUREMENT

79

3. X-Y plotter d igi ta l outp ut

All the dat a displayed on the screen is the ou tput appearing o n the X-Y

planer con nected with this instrumen t through RS-232C cable. Theop/e ration of inst rumen t is describ ed as follows. Refer to the plotter

operation manual attached to plott er for ins truc tions on the X-Y planeroperation .

3·1. X-Y plotter

HP-GL (RS-232C specifica tion) plotter

3-2. Specification

( ]) Cha racter a nd cursor

All the charac ters and cursors displ ayed on the screen are plotted.( 2) Waveform data

All th e waveform dal a displayed on the screen are plaited. The

horizontal and vertical waveforms with 10 and 8 div arc plotted.In ma gn ification mode, on ly the magnifi ed sector is plotted.

(3) G rid and sca le

Th e grid with hori zontal and vertical 10 and 8 div are plotted. In

hori zontal and vertical rids , the 0.2 div ni t sca le is plott ed.(4) Screen mode

Setting DIP S/W on the rear side makes it possible to select four

scree n modes. Refer to chapter 3.4, SElTING for more details.(5 ) Pen repl acement

It is possibl e to speci fy the pen replacement using DIP S/W on therear side. Refer to chapter 3.4, SElTING for more details.

(6) Example of plouingsFig. 3-1 ( a) thru 3-1 (d) show th e example of ploui ngs.

lJ~

I LJ <------::> ul0 c- -1x- - - - - t - - - . - --_ . . - - 0 _ O_ j 0 0 0 - . - .. ~

p :::> J < \ +Ul Jl I f--'>

--- -, I <,/

0I :> \ m

~ I-.-.

0~~

t <, \ f-J .x F: :>I ---- <'""

,~

[:: l --0 -- :>< F-- 1 .: z

l 1."\

j <p

J::0

L :s:bn b

~I :< V

~ P /f.-"- j ----~ . I '--- :> Jf--'> 1 C:3

UJ ~ I r-- - :>

~j < c..n

'"If-'>. I < t> \~ [

~

Fig. 3-1 ( a) PLOT OUTPUT DISPLAY 1

81

, '" Ii +1 2V NCRM 51 SM! , . . . -.. . ... - -. ... .l If\ /~ f\ ~ 7\ r\I II { II II I,

: \ / \ \ T

\ / \I i d

~, I ! n - l

~

I I II

: I , ! II I II I i ~

, I

~~;I I

L-- L.J L i LL.:.-J -1--• .. . . .

i PIOX! 0.2 ' . l OX V 0.5 l1S

G.Tl +4 Om NCRM 51 SM

L ~r---. .-'V <,

~ V\ I \ 11\ / \ 1(\ / \I V I ~ v rv x, 1\7 \.

•I

k I: - -""

;;;;;::::;;: T~ ,........L i !

r D.~-l '- - L0- W '-

() ~ . II (\ \1 0 "() A 1_ - ~. " () m..,

IPioxi 0. 5 ' lOX OV 0.5 rns

Fig. 3·' ( b) PLOT OUTPUT DISPLAY 2

82

~-~ $~-- -T;-:J> ~ --

i ~ 'F ,, :-;,. .. ··..tI....

~-F=-:P I .~F-- C'-~__D-c , '-I

c

;f -:~ til--

I.---~ i Ul

-- .J

~ :I- --- , ~c: :---- - ..... ,

ro c- --'--- :J .C I _ _til - . --,

,= j.-. ,:: ~;.I.... . .. .,. II'

- -=c t . ,~~J~ _:J c: 1-- - -

~~- ' ..:,"

31 ­II

o-c

-if II <: "U

..;

.... ~ . <: +< <:: 111

. -c::: '-I-- ru-e:: ...-

<

-T <::~ ,

.1.- -c::: 011. .. ...

--'

~ »>- ~:::>

111 -----e::

-s- - . - -;:;rtil -- II'

_1 I 3! I--·-r- T--~

, I •-t--l -- .::S..I: + Il I I: oi .

-r--t- -"~':l

I I 1'; 0 I, c. ,

Fig. 3, ' ee) PLOT OUTPUT DISPLAY 3

83

~t;r-·- -rr-

~- -m___ _ -l.. .. . .... .

· ·· · ·~lr~.... ..~~--

.,! I - T

~ l~--+ - - -i--t -,

1I ' .~ I

to:t- .

l i H

!I Ll

In I r

i!l l I I ~f ~ I rt~a -J-I~

iii l r I L.. . - II']

J.

_....JII

~~~· " ··~F ··J~J~~~ ~l u / ~

<, 11 I 3r

~.~ .

./ \ I'..... I :DF L--,

1 rI , rIn I

Pn< i

1"\ ~ V ,p (U1

I '" l r-- I{'~

/' (

Fig. 3-' ( d) PLOT OUTPUT DISPLAY 4

84

3-3. Co nnections

Connect X-Y plotter with the connector on the rear side usin g RS-232Cinterface cable. Fig 3.2 shows tbe wiring of RS-232C int erface cab leused to connect the gra ph ic plotter HP7475A with the instrument.

FG

TXD

RXD

RTS

CTS

DSR

DTR

SG

t o 0 I

20 0 2

3 0 0 3

4 0 0 4

5 0 - - f- O 5

60 0 6

20 0 0 20

7 0 0 7

FG

TXD

RXD

RTS

crs

DSR

DTR

SG

3-4 Setting

Fig. 3-2 RS-232C INTERFACE CABLE W IRING

Using DIP SIW on the rear side, set botb the PLOT and communic atio nmodes.

Off

ION BBBBBB BBo

No. I 2 3 4 5

II ~Date formatCommunication type

6 7 8

l ' L S~reen modePen replacement

Ex I) HP7475A plo tter (9600 BAUD RATE)

NO. 1 2 3 4 5 6 7 8

stale 0 I I I I I 0 0

(Oscilloscope side)

85

NO. g 8 7 6 5 4 3 2 1Pin name S2 SI Y US A3 B4 B3 B2 B1

Sla te 0 0 0 0 0 1 0 I 0

( Ploner side>

Ex 2) HITACHI 681-XA PLOTTER (9600 BAUD RATE)

NO. I 2 3 4 5 6 7 B

Slale 0 0 I 1 I I I) 0

(Oscilloscope side>

NO. I 2 3 4 5 6 7 B 9 9

Sta te 0 I I 0 I I 0 I 0 0

( plotter side)

(I) PLOT Modc(a) Screen mode setting

Screen size can be set using DIP SfW No. 7 and 8. One mode isselected out of the modes in tab le 3-1.

Table 3-1 . Screen mod e setting

Screen DIP SfW Descri ptions Screen Size

mode NO.7 NO. 8 (mm)

1 OFF OFF One screen is plotted in a sheet 175 X 140

of A4 paper Refer to Fig .

3-1 (a)

2 ON OFF Two screens are plotted in a 118x95 .8

sheet of A4 paper Refer to Fig.

3-2 (b)

3 OFF ON Four screens are plotted in a 87 x70

sheet of A4 paper Refer to Fig.

3- 1 (c)

4 ON ON Two screens are plo tted in a 87 x 70

sheet of A4 pa per Refer to Fig.

3-1 (d)

(b) Pen replacement settingIt is possible to set the pen replacement listed In tab le 3-2 usingDIP S/W 6.

Table 3-2 Pen replacement settinq

DIP S/ W Pen feplacementNO.6

OFF NO

ON YES

When DIP S/W 6 is set to OFF. six colors arc used for plotting.

Table shows the details of plot and corresponding pen number.

Table 3-3. Pen number corresponding to the details of plot.

Details of plot Pen numberG RID AND SCALE I

C H I 3WAVEFORM C H2 4

SAVE A 5SAVE B 6

CU RSOR 2CHI 3

VOLTS/DIY CH 2 4

SAVE A 5Character SAVE B 6

SWEE P 1TIM E RANGE SAVE A 5

SAVE B 6Others I

X7

( ~.) Com m un ica u o n mod e

Set baud rat e a nd data fo rmat depending on the plotter speci fica tion and

use. S~Hn (' baud rate and data forma t sho uld be set in the instrument andplott er .

( a) Baud rat e se tting

It is possible to set RS-232C baud rate as shown in tab le 3-4 usingDIP SiW 3,4 and 5.

Table 3-4 Baud rate se ni ng

DIP siwBAUD RATE

NO. 3 NO. 4 NO. 5

OFF OFF OFF 300 BAUD

0;\1 OFF OFF 600 BAUD

OFF ON OFF 1200 BAUD

ON ON OFF 2400 BAUD

OFF OFF ON 4800 BAUD

ON OFF ON 9600 BAUD

OFF ON ON ~

ON ON ON ~

(B) Data format setting

It is possib le to set RS-232C data format as shown in table 3-5using DIP SiW 2.

Table 3-5 Data format sening

DIP Si WData Form at

No. 2

OFF START BIT + 8BIT + ISTOP BITON START BIT + 8BIT + 2STOP BIT

88

(0) Co mm unication mode settingDIP S/W 1 sets RS-232C commun ication type ( unilateral or bilateral )

Unilateral co mmunicatio n means the plotter output and bilateral

co mmunication mea ns the co mm unica tio n with person al computer.

Tab le 3-6 Communication type selli ng

DIP S/W Co mmunica tion typeNo.1

OFF Un ilateral ( plotter output)

ON Bilateral (communicatiof with persona lcomputer

Note : Before turnmg on th e instrument, check DIP S/W setung.If you want to change the DIP S/W setting for communicationmode, make it sure to turn on the instrument after the

setting.

89

3-5. Ope ration

\\'111:11 th e in strument is in HOLD mode. pressing [ PLOT] SAV starts

plotting. Red lamp lights lip while plotting is carried out. When

plotting is oye r. lamp goes o ut and pen is relea sed .

3-6. RS -232C interfa ce

Th e instrument is equipped with RS-232C as a standard func tio n. This

function enables person al computer to control the plottin g operation aswell as data input/ou tput to/from co mputer. Th is communication functioncan not be used together with the output to the X-Y plotte r.Do not use the X-Y plotter output function (plotter output using PLOT

S/\V) when you use the co mputer co mmunication function .

3-7. M ajor troubles

If X-Y plotter does not operate normally, chec k th e followin gs :

( I) Cable wiring is not don e in accordance with Fig. 3-2.

(2) X-Y plotter power turns off.(3 ) Co mmun ication type setting ( DIP S/W 1) is wron g.(4) T he instrument is not in HOLD mode.(5) Baud rate and data format are not properly set (Set them correctly

after turn ing power off. Refer to paragraph 3.4 (2»

(6) Bau d setting is not correct on the plotter side.( 7) When plotting stops, turn plotter power off and on to initialize

plotter. Then try to perform plotting.

'i()

4. RS-232C

4-1. Int rodu ction

RS-232C is the serial communication interface standardized by U.S.Electronic Industry Association , and transmits and receives digital data

through RS-232C interface.

4-2. Specification

( I) Electric feature(2) Tra nsmi ssion type(3) Stop big length(4) Character len gth(5) Parity bit(6) Separating character(7) Transmission rate(8) Communication protocal

EIA RS-232 is applicableNon-synch ronizationI bit/2 bits8 bitsdisabledCIR300, 600, 1200, 2400, 4800 or 9600 BAUDHardwire hand sha ke

4-3. Co n nector pin alignm ent and signal technology

(I) Fig. 4-1 and table 4-2 shows the RS-232C connector pin alignmentand pin functions, respectively.

Fig. 4-1 . RS-232C connector pin alig nment

NOTE : Use DB-25P (FEMAL E) which is used for connector cable.

() J

Table 4 ·1 . RS·2 3 2C Connecto r terminal

Pill No. Signal Function Signal direction

I FG (."'A) GND configuration

2 TXD ( IlA) Data transmisxion OUT

3 RXD ( BIl) Data reception IN

4 RTS (CA) Transmission request OUT

5 CTS (CIl) Trans missio n INreques t

6 NC Non-connec tion

7 SG (AB) Signal G ND

8 NC Non connection

9 " ~

10 " ~

I I ~ ~

12 ~ ~

13 ~ "14 ~ ~

15 ~ ~

16 ~ ~

17 " "18 " "19 ~ "20 ~ "21 ~ "22 ~ "

23 ~ "24 ~ "25 NC Non connection

92

® SG

® RST

® RXD

®crs

( 2) RS-232C inte rface signa ls a rc as follows:

<DFG G rou nd co nfigurationCha ssis ground cable

@TXD Data tran smi ssion

Data output signal transmission+9V level - - - - - "0" (space)- 9V level -- - - - "I " ( mark)

Dat a recept ion

Data input signal recepti onTransmission request

Th is output signal indicates the transmissionrequest state, and is used to control the data

transmission function at modem transmission pan."0" ( space) - ca rrier transm ission request" I " ( mark) - carrier stop request

Transmission permission

This input signal co ntrols modem transm ission part,

and is in an indication state when modem transmissionpart is allo wed to transmi t.Signa l grou nd

Signal ground cable

4-4. Connection

Connect the instrument to personal comp uter using RS-232C interfacecable. Interface varies depe nd ing on perso na l computer type. So readoperation manua l carefully befo re connec ting it to personal computer,and select proper interfa ce ca ble. Fig 4-2 shows the RS-232C interface

cable wiring used for connecting GoldStar Precision Co., LId's personalcomputer B-I6 with the ins trument.

FG

TXD

RXD

RTS

CTS

SG

1 0 1 0 1 1I

2 0 rO2 I3 0 0 3

4 0 0 4

5 0 0 5

7 0 0 7

FG

TXO

RXD

RTS

CTS

SG

Fig. 4-2. RS-232C INTERFACE CABLE WI RING

93

4-5. Operating function and function command

If the instrument is connec ted with personal com purer through RS-232Cinterface. it is possible 10 use personal computer with appropriateprograms. Function command designate the program operation to becarried out by instrument, It is possible to prepa re a set of programs

using personal co mputer to configure the automatic meas urement systemhaving a variety of function s. The functions to be used by usingRS-232C and function comma nds a re described as follows:

( I) Pan el sellingPan el selling enables th e communication with personal computer in

both storage or non storage mode. For data communication, set itto storage mode to transmit accurate data.

(2) Opera ting function

<D Waveform data transmissionThe instrumen t has the followi ng six data memories.

CH I acq uisition memory stori ng CH I waveform data.CH2 acquisition memory storing CH2 waveform data.Two sweep trace memories (SAVE A and B)CH I display memory

CH2 dis play memoryCH 1 and CH2 acquisition memories have each 2000 data loadcapacity depend ing on the sa mple mod e. CH I and CH2 displaymemo ries two sweep trace memorie s have 1000 data load capacity.

CH I and CH2 display mem ories and two save memories can betransmitted using personal computer.

Tab le 4·2 Sampling mode and acquisition

Sample mode Acquisition memory capacity

ROLL 1000

NORM 2000

EQU IV 2000

The number of data to be transmitted eac h time is selected

within thc memory capacity. Decimal ASC II system or binarysystem is selected as data transmission type. Waveform data ofeach memory is S bits. That is to say, it is between a and 255

for decimal number a nd between (00) 16 and ( FF) 16 for

hexadecimal number. The scope of these data corresponds to ten

vertical div, on the CRT.The data corresponding to central crosshair is 12S. «SO) 16 in

haxadecimal nu mber) . Data 0 « 00) 16) means th e location one

step lower than graticule line. Data 255( ~FF) 16) means th elocati on one step higher than grati cule line .

255

(FF) " 1 DIV~.,..--,---.--....----,--..,.-,,--r--,----

2281-+-+--1--+--+-+- -11-+--11-

128

(80 ) "

28

o _ .1 DIV

(00) "

® Measuremen t condition data transmission (C haracter

tra nsmission)It is poss ible to tran smit th e waveform measurement condition

to SAVE memory A or B usin g person al computer comma nd. All theda ta are transmitted except for specia l data . The data formatfor the measure ment condition is subject to ASCII system.

@ Waveform da ta recepti onThe details in SAVE memory A an d B can be cha nged usingwaveform da ta coming from personal computer. Set RECALL S/W toON so that the rewritten data are displayed on the CRT.

@) Measurement condition data recept ion (character reception)

The meas urement condition da ta coming from personal computerca n be registered as the data for SAVE memory A or B waveform .Wh en RECALL S/W is set to ON , the data of VOLTS/DIY an d

TIME/DIY are displayed on the CRT.

95

4-6. Transmission data format

Th e transmi ssion data format is as follows:( j) Waveform data transmi ssion format

After receiving Ri command (i= 1-4) the instrument transmits the

waveform data in the following format. Refer to tab le 4-4 for eac h

item.

• ASC II System

• Binary System

(2) Waveform da ta recepti on format

• ASCII System

• ASCII System

Co mma ( , J is the sepa ring character code. DEL type is C/R. In

binary system, D I th ru DN are binary da ta. and rernain ings are ASCII

code dat a. In binary syste m the sepa ra ting charac ter code are not

used for D I thru DN data.

O J Measurem en t co ndition data transmission and reception format.

After ins trument receives Ro command, the memory waveformmeasurement co ndition data arc transmitted in the foll owing format.Refer to table 4-5 for mo re detail s. When the in strument receives

Wo comma nd. it receives the data sen t in the following format, and

registe r the m as measurement co ndition da ta for the designated SAVE

memory.

96

Table 4 J. Function command

No. Function Command Description Transmissio n fonnat

I Transmissionl SI • Check the transmission/

reception signal command reception signal to enable ~check communication with

personal computer.

2 Waveform data Ri • The transmission of •

transmission command waveform data stored in IR i(mmmm.nn nn.X) DELImemory i is designated by

the data number ( nnnn) I denotes the memorynumber.

Whose head has address

data (mmmm) .

• ASCII or binary system may i Memorybe designated as transmission

I CHI Display memorymethod by X on the right

column. 2 CH2 Display memory

• After transmitting this 3 Save memory A

command. personal computer 4 Save memory Breceives the designated data.

.mmmm" : Frontaddress o(memory

Four digit integer :

oo»-rm!

•nnnn· : Number of transmitted

data

Four digit integer :

lXXll - lOOO (save memory.

CHI and CH2 display

memory)

I =A : ASCII system

B: Binary system

'17

No. Function Command Description Transmission format

J Measurement con Ro • designates the transmission

d ition data command or waveform~transmission measurement comdition data

Chareter stored in the memory I • "i"(- 1- 4) denotes theransmission) memory number.

• After transmittion this

command. personal computerreceives the designatedda ta•

4 Waveform data Wi • Personal computer transm its

reception command mits waveform data to the Eif mmmm. nnnn.X) DELIinstrument to designate

SAVE memory A and B inorder to write a series of t denotes the memory number.

data from the front memory i"should be J or 4

address (mmmm),

• ASCII or binary system may i Memorybe designated as transmissionmethod by X on the 3 Save memory A

right column. 4 Save memory B

• After transmitting thiscommand. personal computertransmits waveform.

•mmmm" : Front address of memory.Four digit integer:

lXXXl-0999

"nnnn" : Number oftransmined

data

Four digit integer:0001 - 1000 (save memory.

CHI and CH2 display

memory)

x=A : AScn system

B: Binary system

No. Function Com mand Descript ion Tran smission forma t

5 Mcsurcmcnt co- Wo • Personal computer transmits

nd ition data command the measurement condit ion~reception to the instrument. and

(Character designates memory to save

reception) the waveform measurement

condition data stored in "i" denotes the memory number.the SAVE memory A and B. "j"should be 3 or 4

• After transmitting this i Memorycommand. personal computertransmits measurement 3 Save memory A

condition data. 4 Save memory B

Table 4 -4. W aveform data transmission format

No. Item Name TypeASCII System Binary System

Data code Byte Data code Byte1 i@ Memory number "i"is ! thru 4 ASCII 3 ASCII 3

(Not, 2)

2 mmmm Fron r address Decimal number. ASCII 4 ASCII 4

Four digits 0001- 1000

3 nnnn Data number Decimal number. ASCII 4 ASCII 4

Four digits 0001 - 1000

4 Di Data • ASCII system, Decimal ASCII 3 Binary !

number numberThree digits/I data

000 - 255• Binary system

8 bits binary data

S DEL Separating C/ R ASCII 1 ASCII 1charac ter

Note L: Sepa rating charac ter data format is C/ R.

Note 2 : 3 or 4 is design ated in reception mode.

100

Tab le 4 - 5 . Mesurement cond ition da ta tra nsmiss ion/ recept ion format

Number of bytes (Note J)No. Item Name Type

Trans . Ree.

I @ j Memory number " i" is 3 or 4 3 J

2 V.M vertical mode CIII. CH2, CHOP ([)ual trace mode

i.') contained) 4 4

Ooc of ADDs

J II.M Hori zontal Alincluding ALT mode) or B 1 Imode:

4 A.T A TIMElDlV A TIME range value: Alignment at

(note I) the left end 9 9Unit : S. MS. MICS

(Alignment at the left end)

5 B.T B TIME/ DlV B TIME range value : Alignment at(note I) the left end 9 9Unit: S. MS, MICS

(Alignment at the left end)

6 V.C VOLT CAL CAL or UNCAL(Alignment at the 5 5left end)

7 P.F PROBE Factor PIX of PIOX (Alignment at the 4 4

left end)

8 V.D VOLTS/DlV VOLT range value.: Alignment at the(Note 2) the left end) 7 7Unit : V. MY

(Alignment at tne left end)

9 RSV Spare 9 910 N. S Number of J 3

sweeps

II RSV Spare 2 2

12 DEL Separat ing I I

characthe

No te : 1. For example. 50ms and O.2ms arc indicated as 50ms (alignment at the leftend)and O.2ms respectively (alignment at the left end) .

2. For example. 50mv and 5mv are indicated as 50mv (alignment at the leftend)and 5mv respectively (alignment at the left end).

3. They arc "recep tion" and "transmissio n'Trorn the viewpoint of ins trument.

101

4-7. Separating cha racter

Controller transmits the separating character to inform the instrumentof the end of da ta in order to tra nsmit waveform data or functioncommand message. The separating character is C/R.

4-8. Abnormal operation handling

Instrument sends the return code to response to the mess age command, orinform personal computer of the state. The following shows the type ofthese state bytes.

No. State byte Description

I 41 Command is normally treated.

2 61 Command error

3 62 Data error

4 63 Data detail error

The command error return code is transmitted when format error occursin the message command.

4-9. RS-232C interface cable connection a nd instrumen t operation

(l) 3Connect in strument with personal computer using RS-232C cable.

(2) Set th e communication mode between instrument and personalcomputer in accordance with paragraph 3.4. (2) .

(3) Though it is possible to communicate with personal computer in

storage mode or NON storage mode, set storage mode in order toensure accurate data transmission.

4-10. Selection of program for data transmission

Run the simple test program to ensure satisfactory execution of programby sending the function command the instrument and by checking the data

received from instrument ("Sl" command) . This simple test programchecks whether it is possible to communicate with system. The programshall be subject to the personal computer which runs the program

itself. Read the computer operation manual carefully prior totransmi ssion in order to ensure data buffer area and to set the

separating character.

102

4-11. Major reason s of abno rma l data transmi ssion

In case data are not tran smitted satisfactorily, chec k the followings(J) Cable is not wired in acco rdance with fig. 4-2.(2) "51" comman d is not executed in the first plac e.0) Th ere may occur erro r in da ta reception function at 9600 baud.(4) There may occur error in EQUIVALENT or MAG mode at the rate higher

than 4800 ba ud.(5) The instrument mode does not concide with persona l computer

communication mode.(6) The personal computer port setting (COM I or COM 2) is not

correct.(7) If communication mode is changed, tum the instrument power off

and on.

4-12. Programming example

Following is the example of program s executed when the instrument isconnected with person al computer. Before connecting person al computer,set the instrument in reference to the communication mode as describedin paragraph 3.4 (2). In th is section, the programs for the personalcomp uter compatible with IBM personal computer is used as an example ofeac h functi on command.Input signa l

RS-232C interface cable (Fig. 4-2)

0 5-3020D personal

oscilloscope e---' '--- computer

103

Following communication mode is used as an example of program.

( a) Baud rate : 4800 BAUD(b) Data form : START BIT + 8 BIT + 1 STOP BIT

(c) Separa ting cha racter : CIR( DIP S/W on oscilloscope side )

I NO' 1 1 2~state 0=

( Computer program side )

OPEN "COMl (or COM2) : 4800. N, 8, I, CS , OS, CD" FOR RANDOM AS # 1

104

( l) Program example I "Sl" comma nd"SI" command is alway executed in the first place. This is a programto check that communication func tion is ena bled.

Pro gram exampleTh e following program is the program for IBM compatible person alcomputer.

10 • ••• 51 COMMAND • ••••20 • • •• EXECUTE THIS PROGRAM UNTIL RTNS IS A(HEX41 )30 OPEN "COM2: 4800. N. 8.1. CS. OS. CO" FOR RANDOM AS #140 PRINT #1. "SI "50 LINE INPlIT #1. RTNS60 RTN : ASC(RTNS)70 IF RTN <> &H41 THEN 10080 PRINT "RI RllTURN- "; RTNS90 GOTO 110H10 PRINT "ERROR STATUS- " ; RTN110 CLOSE #1120 END

( Explanation) By running " SI" comma nd in the first place . it is

possible to check whether it is possible to comm unicatewith computer ( tra nsmission/ reception). This sho uld berepeated until in strument sends response "A" ( Hex 41) .

105

(2) P rogra m example 2 "Ri " co mm an dT hi s program receives 50 words o f CHI wa veform from zero add ress using

" Ri" co mm a nd .Progra m example 2-1 : ASC II code conversion; IBM co mpatib le personal

co m puter

10 ** •• Ri (mmmm, nnnn.X) COMMAND •••••2030 i --- - > 1 : d lsp lay .memory chi40 2: di sp l ay memory ch250 3: SAVE memo r y A60 4 : SAVE me mo r y B70 mmmm -> sta rt address80 nnnn - > data numbe r90 OPEN "COM2: 4800, N,8, I , CS, DS. CD" FOR RANDOM AS # 1100 PRINT #1. "Rl (001l0. 00 50. A) "110 LINE INPUT #1. RTNS120 PRI NT " RI RUTIJRN=" ; RTNS130 CLOSE #1140 END

P rogram exam ple 2-2 Binary code con versio n. IBM compatib le

personal co mputer

10 **.* Ri(mmmm,nnnn,X) COMMAND • • *• •20 DRAW BINARY DATA FORM3~ •• ••••••••••• ••••••••••••• ••••• • • •40 OPEN "COM2 : 4800. N. B. I. CS, DS. CD" FOR RANDOM AS # 150 PRI NT #1, "Rl (0000,0050. B)"60 RTNS = INPUTS04. I )70 FOR I = 1 TO 49B0 WRKS INPUTS0 , 1)90 RTNS = RTNS + MI DS (STRS (ASC(WRKS) ) , 2) +100 NEXT I110 PRINT " Rl RUTURN="; RTNS120 CLOSE #1130 END

IO!>

(3) Program example 3 "Ro· comma nd

This program receives and displays the sweep trace memory Ameasu rement cond ition data using "Ro" comma nd.Program example 3 : IBM compatible personal computer

10 • ••• Ro(i) COMMAND •••••20 OPEN "COM1: 4800. N. 8. 1. CS, OS, CD" FOR RANDOMAS #130 PRINT #1. "Ro (3) "40 LINE INPUT #1, RTNS50 PRINT "Ro RUTURN- "; RTNS60 CLOSE #170 END

!07

(4) Program example 4 "W i" comma ndThi s program writes data in sweep trace memory A using "wi" command.

Th e 0 thru 999 add ress waveform data are written in sweep trace memory

as sho wn in fig. 4-3.

Program example 4-1 ASC II code conversion

10 ••• WI (mmmm.nnnn.x) COMMAND (GW-BASIC) ••••20 DI M AS( 1000)30 CNT ~ 040 FOR 1 = 1 TO 250 FOR B = 1 TO 25060 IF B >= 100 THEN BS = MI OS(STRS (B) . 2. 3)70 IF B < 100 THEN BS = " 0" + MlDS(STRS CBl. 2. 2)80 IF B < 10 THEN BS • " 00" i MI DS(STRS (B) . 2. 1)90 AS CB + CNT • 250) = B$ + " v "

100 NEXT B110 CNT = CNT ' 1120 fOR B = 1 TO 250130 C = 251 - B140 IF C >= 100 'mEN BS = MI OS (STR$ (C) . 2. 3)150 IF C < 100 TIlEN BS = "0" + MlDS(STRS(C) . 2. 2)160 IF C < 10 THEN BS • "00" + MlDS (STRS (C) . 2. 1)

170 AS(B + CNT • 250) = BS + ' ', "

180 NEXT B190 CNT = CNT + 1200 NEXT I210 OPEN "COM2 : 4800. N. 8. 1. CS. OS. CD" FOR RANDOM AS #1220 PRINT #1, " W3 (0000. 1000. A)"230 LINE INPUT #1. RTN$240 RTN ' ASC(RTNS)250 IF RTN <> &H41 THEN 360260 PRINT " Wi COMMAND PASS"270 PRINT #1. " #3@. 0000. 1000. ":280 FOR I = 1 TO 999290 PRl/iT #1, AS (I) :300 NEXT I310 PRI NT #1. AS(l)320 LI NE I NPUT #1. RTNS330 RTN = ASC(RTNS)340 I F RTN <> &H4 1 THEN 360350 GOTO 370360 PRI NT " ERROR STATIJS·": HEXS( RTN)370 CLOSE #1380 END

lOX

Program exa mple 4-2 ASCII code conversion

10 •• • WI (mmmm,nnnn, x) COMMAND (GW-BASIC) ••••20 binary data t rans30 DI MAS (1000)40 CNT - 050 FOR I - 1 TO 260 FORB -1T025070 BS - CHRS (B)80 AS(B + CNT • 250) - BS90 NEXT B100 CNT - CNT + 1110 FOR B -1 TO 250120 C - 251 - B130 BS - CHRS(C)140 AS (B + CNT • 250) - BS150 NEXT B160 CNT - CNT + 1170 NEXT 1180 OPEN "COM2 :4800, N, 8, 1, CS, DS, CD" FOR Ro\NDOMAS #1190 PRINT #1, "W3(0000, 1000, B)"200 LINE INPlIT #1, RTNS210 RTN - ASC(RTNS)220 IF RTN <> &H41 THEN 330230 PRINT "Wi COMMAND PASS"240 PRINT #1, "#3@,0000,1000, " ;250 FOR I - 1 TO 999260 PRINT #1, AS ( 1) ;270 NEXT I280 PRINT #1. AS (1)290 LINE INPlIT #1. RTNS300 RTN - ASC(RTNS)310 IF RTN <> &H41 THEN 330320 GOTO 340330 PRINT "ERROR STATUS-"; HEXS (RTN)340 CLOSE #1350 END

109

(5) Program example 5 ·Wo" commandThis program registers the measurement condition data stored III sweeptrace memory A using "Wo" command.

10 ••• Wo (i ) COMMAND (GW-BASIC) ••• .20 DATS · DATS + "#3@, " ' memory number30 DATS · DATs + "CHI , " 'vertical mode40 DATS - DATs + "A," ' hor i zont a l mode50 DATS · DATS + "50ms 'A TimelDiv60 DATS · DATS + "20ms ' B TimelDiv70 DATS · DATS + "CAL , ' vol t CAL80 DATS · DATS + "PI0X," ' probe factor90 DATS · DATS + "0. 5V ' vol t s lDi v100 DATS · DATs + "10DI V 'delay amount110 DATS · DATS + " I , ' No of sweep120 OPEN "COM2: 4800, N,8, 1. CS, DS, CD" FOR RANDOM AS #1130 PRINT #1. "Wo(3) "140 LINE INPUT #1, RTNS150 RTN · ASC(RTNS)160 IF RTN <> &1141 THEN 230170 PRINT "Wo COMMAND PASS"180 PRINT #1, DATS190 LINE INPUT #1. RTNS200 RTN · ASC(RTNS)210 IF RTN <> &114 1 THEN 230220 GOTO 240230 PRINT "ERROR STA11JS·" : HEXS (RTN)240 CLOSE #1250 END

I III

5. USE R MAI NTE NAN C E GUIDE

In order for you to usebetterthis instrument, OS<mOODSRS. please refer to

the following. And if any failure occurs during U~. please contact the

EZ Digital service center for professional repair service .

5-1. Cleaning

If the outside of the case is stai ned, remove the stain by wiping itlightly with cloth moistened with neutral dete rgent, an d then wipe outthe cleaned surface again with a dry cloth. In case where the surfacegot rusty, wipe the surface with cloth satu rated with alco hol. Do notuse stro ng volatile solvents such as benzine or th inner.When you clean the surface of the CRT, wipe out the surfaces of thefilter and the CRT carefully with soft clot h moistened with milddetergent afte r having the fron t case and the filter disassembl edfirst. Unde r no circumstances sha ll the abras ive or stro ng solvents beused. And then, reassemble the filter and front case after hav ing themthoroughly dried so as to prevent dew from being form ed on theirsurfaces. Take care not to leave any hand mark or the like on thesurface of the CRT or filter.

5-2. Ca libration

To maintain the accuracy of the measurement, calibration of OS-3000DSRS

sho uld be performed at least every 1000 service hours when theinstrument is used continuously, and every 6 months when usedintermittently. So far as the calibration of thi s instrument isconcerned, plea se co ntact the EZ Digital , ca libration andinspection agency authorized by the government.

Fit TER

FR ON T CASE

I..Fig. 5-1. FILTER DISASSEMBLYING

III

h. OS-31NNIDSRS DIAl ;IL\i\IS

6-1. External Views

OS-30200 / 0 S-30400 / 0 S-30600

•" •

"<•.>

:~f I

ILJ

11 2

6-2. Block Di agram

,­,,,,,,,,,,,- ' ,- , ,

~ , ,s : :I ' ,. , ,i I I

__ _ _ _ _ .J I,,,,, - - --.,, ~,.,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

113

,-- - ~

.- - - -- -', "" ': ~ a: :: :;: : :--- ; ~_ __ _ , : I ~,

IIU': i ~I i j: I 3 I '_ _ I I '-- I -- ' :

i

--.,,,,,,,,,,,,,,,,,,,,,,,,,,

II :,

~.·: : ~ :r ·

:'TIJ~·w:,: I

" '" ', . ,, '-----_.....

The specifications are subjected to change without notice.